410+ Adjectives That Start with O: Words with Definitions and Examples

Looking for adjectives that start with O? Find below a list of over 410 adjective words that will make your speech original and outstanding!

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Adjectives That Start with OA, OB (45 Words)

oafishIll-mannered and coarse and contemptible in behavior or appearance My fellow, oafish roomate has shared my computer with me periodically.
oakenConsisting of or made of wood of the oak tree A new oaken enclosure was built and new wiring and electric bellows bought.
oatenOf or related to or derived from oats In the earlier times oaten kisiel was more common.
obdurateShowing unfeeling resistance to tender feelings Actually, there are some fairly obdurate myths about the london climate.
obedientDutifully complying with the commands or instructions of those in authority- He was most obedient to the elders.
obeseExcessively fat The filly is obese, so you should stop feeding her.
objectionableCausing disapproval or protest It’s deemed to be patronising, sanctimonious and totally objectionable.
objectiveServing as or indicating the object of a verb or of certain prepositions and used for certain other purposes The objective is not to be punitive.
oblanceolateHaving a broad rounded apex and a tapering base The leaves are obovate or oblanceolate, sometimes narrow oblanceolate.
oblateHaving the equatorial diameter greater than the polar diameter; being flattened at the poles M19 is the most oblate of the known globular clusters.
obligateRestricted to a particular condition of life In amphibians it can be obligate or facultative.
obligatedCaused by law or conscience to follow a certain course He is not obligated to reply in the slightest.
obligationalRelating or constituting or qualified to create a legal or financial obligation
obligatoryRequired by obligation or compulsion or convention Whether an act is supererogatory, or obligatory, can be debated.
obligingShowing a cheerful willingness to do favors for others Your enhanced opinion and obliging moderation is noted.
obliqueSlanting or inclined in direction or course or position–neither parallel nor perpendicular nor right-angled The opening or mouth of the pitcher is ovate and oblique.
oblique-angledHaving oblique angles The angled rafters and eaves of the roof stones conveys linear expansion.
obliterableAble to be obliterated completely
obliterateReduced to nothingness The people obliterate the temple of baal.
obliteratedReduced to nothingness It is unconscionable to obliterate that fact from ‘the boere’s history.
obliviousFailing to keep in mind Brava is oblivious to the knocking.
oblongDeviating from a square or circle or sphere by being elongated in one direction The oblong leaves appear at the base of the plant.
obnoxiousCausing disapproval or protest He’s just being obnoxious and histrionic.
obovateEgg-shaped with the narrower end at the base Each leaf consists of three obovate leaflets with serrate leaf margins.
obsceneOffensive to the mind The humor is politely and subliminally obscene.
obscureNot drawing attention The etymology of the name is obscure.
obsequiousAttentive in an ingratiating or servile manner They could be better and less obsequious.
observableCapable of being seen or noticed Behaviorism focuses only on the objectively observable aspects of learning.
observantPaying close attention especially to details Pandora is probably the most observant and intelligent of the borgias.
observationalRelying on observation or experiment The design of an experiment or observational study often influences the power.
observingQuick to notice; showing quick and keen perception The family raised the children observing jewish holidays.
obsessionalCharacterized by or constituting an obsession Your interest in this man appears to be verging on obsessional.
obsessiveCharacterized by or constituting an obsession The obsessive need to control everything and everyone.
obsolescentBecoming obsolete The first abdominal segment has a yellow band which is sometimes obsolescent.
obsoleteNo longer in use Regardless of the author, the book is obsolete.
obstetricOf or relating to or used in or practicing obstetrics Her work transformed obstetric anaesthesia.
obstetricalOf or relating to or used in or practicing obstetrics This may lead to a life threatening obstetrical emergency.
obstinateResistant to guidance or discipline The most obstinate farmers were persecuted and imprisoned.
obstreperousNoisily and stubbornly defiant He is far from hyperventilating, obstreperous or belligerent.
obstructedShut off to passage or view or hindered from action The rain bearing wind gets obstructed by the hills and brings heavy downpour.
obstructivePreventing movement First, that the influence of the home is obstructive.
obtainableCapable of being obtained The augmented chord is obtainable by only using all the degrees.
obtrusiveUndesirably noticeable However, most people have less obtrusive floaters, like the ones in the image.
obtuseRounded at the apex The focus of this list is too obtuse.
obviousEasily perceived by the senses or grasped by the mind It is too obvious to belabor.

Adjectives That Start with OC (21 Words)

occasionalOccurring from time to time I suffer from occasional choleric imbalances.
occidentalDenoting or characteristic of countries of europe and the western hemisphere I want to learn about the occidental culture.
occipitalOf or relating to the occiput Internal occipital protuberance.
occludedClosed off This is known as an occluded front.
occlusiveTending to occlude Protopic should not be used with occlusive dressings .
occultHaving an import not apparent to the senses nor obvious to the intelligence; beyond ordinary understanding She also became interested in science, mesmerism, and the occult.
occupationalOf or relating to the activity or business for which you are trained I was about to make an occupational decision.
occupiedHaving ones attention or mind or energy engaged He was engaged in the organizational activities in the occupied taganrog.
occurrentPresently occurring (either causally or incidentally) Also known as occurrent, accident or happening.
oceangoingUsed on the high seas Mobile stations are typically large oceangoing vessels,.
oceanicResembling the ocean in apparent limitlessness in extent or degree Ophiolites and oceanic lithosphere.
ocellatedHaving ocelli Only the wet season ocellated form of this species has been recorded.
ocherOf a moderate orange-yellow color Young men cover their bodies in ocher to enhance their appearance.
ochreOf a moderate orange-yellow color Its also known as the ‘ochre threadtail’.
octagonalOf or relating to or shaped like an octagon It is an octagonal building flanked by four octagonal pillars.
octalOf or pertaining to a number system having 8 as its base An interesting feature of the language is its use of octal numbers.
octangularOf or relating to or shaped like an octagon
octogenarianBeing from 80 to 89 years old At that time she was an octogenarian.
octosyllabicHaving or characterized by or consisting of eight syllables Its stanza is made of four octosyllabic lines.
octupleHaving eight units or components However octuple sculls are not used in main competitions.
ocularVisible- shakespeare Someone else will point out the ocular disturbance to the patient.

Adjectives That Start with OD (9 Words)

oddOf the remaining member of a pair, of socks e.g. His odd hobby is to smelt anything metal.
oddestNot divisible by two The phrasing in the previous version was odd.
oddishSomewhat strange Good articles have always been a bit oddish.
odds-onHaving a better than even chance of success Unfortunately, the odds are in favor of the former.
odiousUnequivocally detestable- edmund burke Lists are usually especially odious in the eyes of deletionists.
odoriferousMorally offensive I, however, prefer the usage of odoriferous as it empirically objective.
odorlessHaving no odor It is trackless and virtually odorless.
odorousHaving odor or a characteristic odor It should be free from colored, fluorescing, and odorous compounds.
odourlessHaving no odor Namely, the chemical compound is not toxic as such and it is odourless.

Adjectives That Start with OE, OF (19 Words)

oecumenicConcerned with promoting unity among churches or religions
oecumenicalOf worldwide scope or applicability- christopher morley
offNot performing or scheduled for duties Parts of the colony can break off and clog the fuel lines and fuel filters.
off-beatInformal terms; strikingly unconventional Zito is known for his idiosyncrasies and his offbeat personality.
off-limitsBarred to a designated group It demarcated the limits.
off-lineNot on a regular route of a transportation system The line of reasoning is the apostate line of reasoning.
offbeatInformal terms; strikingly unconventional There isn’t anything mentioned in the article about this offbeat in bluegrass.
offencelessIncapable of offending or attacking
offenselessIncapable of offending or attacking In other words, the chanting of the holy name makes one offenseless.
offensiveMorally offensive She felt offensive to hear such scabrous news.
offhandWith little or no preparation or forethought I couldn’t tell you who the writers of the fact files were, offhand.
offhandedWith little or no preparation or forethought As a swede i take offence at this arrogant offhanded discussion.
officialGiven official status as a national or state institution Elias is the official statistician of mlb and hence the official source.
officiousIntrusive in a meddling or offensive manner They tend to be rather officious and sticklers for rules.
offishLacking cordiality; unfriendly I’d actually be interested, in a stand offish way to see how this pans out.
offshoreAt some distance from the shore The waves break further offshore and therefore reduce their erosive power.
offsideIllegally beyond a prescribed line or area or ahead of the ball or puck The new offside line became the hindmost foot of the scrum.
offsidesIllegally beyond a prescribed line or area or ahead of the ball or puck On the first play, nebraska committed a five yard offsides penalty.
offstageSituated or taking place in the area of a stage not visible to the audience The sound of running water is heard offstage and owen enters.

Adjectives That Start with OH, OI, OK (5 Words)

ohmicOf or relating to or measured in ohms At the time, a major challenge was ohmic metal contact formation.
oil-bearingContaining oil Bearing guides and steps may be used in aligning the bearing in the retainer.
oilyUnpleasantly and excessively suave or ingratiating in manner or speech; It is a pale yellow oily liquid.
okBeing satisfactory or in satisfactory condition But that’s ok if we can disjoin them now.
okayBeing satisfactory or in satisfactory condition Okay discuss on the talkpage the graphs.

Adjectives That Start with OL (23 Words)

oldVery familiar (used for emphasis)old (adj) skilled through long experience I must be getting harebrained in my old age.
old-fashionedOut of fashion We knew him as washie, short for the old fashioned washpeg that his peers at school in south africa said that the gangling youth resembled.
old-lineAdhering to conservative or reactionary principles The symbols are old ideograms.
old-maidishPrimly fastidious She is seventy years old.
old-timeAttractively old-fashioned (but not necessarily authentic) He was 64 years old and in frail health at the time.
old-womanishPrimly fastidious The old man sniffled.
oldenLong past In the olden days it was celebrated in a grand scale.
olderBelonging to some prior time Ren woxing dies later after suffering from giddiness due to old age.
oldestBelonging to some prior time Lucky debonair died of old age in 1987 at age twenty five.
oldishSomewhat elderly He is royalty and talking in a rather oldish and dramatic style.
oldlineAdhering to conservative or reactionary principles
oleaceousOf or pertaining to or characteristic of trees or shrubs of the olive family
oleaginousContaining an unusual amount of grease or oil There is disclosed a process for the sequential extraction of carbohydrates and oil from particulate oleaginous seed materials utilizing aqueous alcohols as the solvent to produce a novel protein concentrate.
oleophilicHaving a strong affinity for oils rather than water The oleophilic resin can be silicone, urethane, epoxy.
oleophobicLacking affinity for oils Fluorocarbons are also lipophobic and oleophobic.
olfactiveOf or relating to olfaction
olfactoryOf or relating to olfaction The olfactory tubercle is a structure involved in olfaction.
oligarchicOf or relating to or supporting or characteristic of an oligarchy All of which goes to prove that an internationalist europe is an oligarchic idea designed to protect the interests of an extremely arrogant ruling class which has taken over the reins of power in europe and is pursuing policies that show contempt for people’s interests.
oligarchicalOf or relating to or supporting or characteristic of an oligarchy Aristotle viewed this model as an oligarchical anathema.
oliveOf a yellow-green color similar to that of an unripe olive Olive groves are also plentiful although many are uncultivated and overgrown.
olivelikeResembling an olive
olympianOf or pertaining to the greater gods of ancient greece whose abode was mount olympus Olympian marcus nash will teach an intermediate to advanced skate skiing clinic saturday at royal gorge.
olympicOf or relating to the olympic games She is an olympic level javelin thrower with unerring aim.

Adjectives That Start with OM (11 Words)

omaniOf or relating to oman or its people Things related to the omani city of salalah.
ominousThreatening or foreshadowing evil or tragic developments The ending of the article seems a bit ominous.
omissibleCapable of being left out A more important problem to be pursued is how to deal with omissible elements.
omissiveCharacterized by omissions
omnibusProviding for many things at once There was also one omnibus route there.
omnidirectionalNot directional They may be directional or omnidirectional.
omnifariousOf all varieties or forms or kinds
omnipotentHaving unlimited power In the other sense, god is said to be omnipotent.
omnipresentBeing present everywhere at once God is omnipresent.
omniscientInfinitely wise It gives the impression of being written by an omniscient author.
omnivorousFeeding on both plants and animals It is practically omnivorous, and feeds on animal and vegetal detritus.

Adjectives That Start with ON (33 Words)

onPlanned or scheduled The poor sleep on mats on the floor.
on-and-offNot in operation or operational Parts of the colony can break off and clog the fuel lines and fuel filters.
on-goingCurrently happening I going to reassert these figures on the article.
on-lineOn a regular route of a railroad or bus or airline system Hawaii’s martin amp; macarthur redesigns its online store.
on-siteTaking place or located at the site Cactuses grow on the southern edge of the site.
oncologicOf or relating to or practicing oncology The device can be used as an adjunctive therapy to other oncologic treatments.
oncologicalOf or relating to or practicing oncology It is used most often in oncological surgery.
oncomingMoving toward one The car ran straight into the path of an oncoming lorry.
oneUsed informally as an intensifier But not a single one passed the eidetic memory test.
one-by-oneUsed of a single unit or thing; not two or more As only one person or hypostasis some argued that he would have only one will.
one-horseSmall and remote and insignificant A horse scraper is used to remove the sweat from the coat of the horse.
one-manDesigned for or restricted to a single person The bacchanalian man was not the one who committed the crime.
one-on-oneOf the same kind or quality One who shall single handedly munch all the cookies in the world
one-partyDetermined by a single party The compatriot party is a political party in azerbaijan and kazakhstan.
one-sidedFavoring one person or side over another His article at the moment is very one sided and uncritical.
one-timeBelonging to some prior time It was one of the most sophisticated houses of the time.
one-wayMoving or permitting movement in one direction only You rebuffed, in your inimitable way, every one of those attempts.
one-womanDesigned for or restricted to a single person One woman had a denture, and there is also evidence for trepanations.
one-yearCompleting its life cycle within a year Us house speaker offers to shelve debt limit for one year.
oneiricOf or relating to or suggestive of dreams
onerousNot easily borne; wearing In the end, the economy faltered and taxation became more onerous.
onetimeBelonging to some prior time The scholarship is available on a competitive basis and is a onetime award.
ongoingCurrently happening The study and the practice are ongoing.
onlineConnected to a computer network or accessible by computer The inventory of the archive is available online.
onlyExclusive of anyone or anything else As only one person or hypostasis some argued that he would have only one will.
onomasticOf or related to onomastics There is an even bigger area from toponymic and onomastic evidence.
onomatopoeicalFormed in imitation of a natural sound- harry hoijer
onshoreOn the edge of the land It was sent for later examination onshore.
onsideNot offside; being within the prescribed area of play Andy reid then tried an onside kick.
onstageSituated or taking place on the area of a stage visible to the audience He once played a baboon onstage.
ontogeneticOf or relating to the origin and development of individual organisms Ontogenetic realization of categorization.
ontologicalOf or relating to ontology Ontological questions are answered by looking in the ontological database only.
onymousBearing a name Syn onymous expressions are very useful in a number of nlp applications.

Adjectives That Start with OO, OP (49 Words)

oozyLeaking out slowly Ben rayer of the toronto star felt that the song had a oozy slow jam .
opalescentHaving a play of lustrous rainbow colors An old man in opalescent robes will be waiting for you on a dias in the center.
opalineHaving a play of lustrous rainbow colors These skeletons are composed of opaline silica.
opaqueNot clearly understood or expressed The shell is opaque and shining.
openAccessible to all Let’s not open the door to infinite indemnity regarding the past.
open-airIn the open air Respirators either purify the air or they give you a supply of fresh air.
open-endedWithout fixed limits or restrictions The diver is an open pool ended object in an airtight container of water.
open-eyedCarefully observant or attentive; on the lookout for possible danger In the kingdom of the blind the one eyed man is king.
open-mindedReady to entertain new ideas He’s the most athletically minded of the kings.
opencastWorked from the exposed surface All the deep coal mines are now closed, but opencast continues.
opencutWorked from the exposed surface Mining continued opencut on the face of the mountain, and underground.
openedNot sealed or having been unsealed The distillery was opened to the public.
openhandedGiven or giving freely The hand can made into a fist making it a backfist or done openhanded as a slap.
openheartedShowing or motivated by sympathy and understanding and generosity In spite of this xiangyun is openhearted and cheerful.
openingFirst or beginning The opening hours are infrequent.
openmouthedWith eyes or mouth open in surprise The rest of the string section sat openmouthed at how well he could play.
operableFit or ready for use or service The bucket is also operable as a clamshell.
operantHaving influence or producing an effect Eeg operant conditioning in intractable epileptics.
operaticOf or relating to or characteristic of opera Operatic debut and professional career.
operatingBeing in effect or operation- leslie marmon silko The partnership can afterwards deduct the payment as operating costs.
operationalFit or ready for use or service The following thursday saw the culmination of the operational sea training.
operationalistOf or relating to or espousing operationalism
operativePerforming or capable of performing The only operative provisions related to the reform of the provinces.
operculateHaving an operculum They are terrestrial operculate gastropod mollusks in the order helicinoidea.
operculatedHaving an operculum He determined the true nature of the operculated coral.
operoseCharacterized by effort to the point of exhaustion; especially physical effort A citation to this effect would seem more than a trifle operose.
ophthalmicOf or relating to ophthalmology It is available as ophthalmic solution.
opinionatedObstinate in your opinions He could be tactless, impatient, argumentative and opinionated.
opinionativeObstinate in your opinions I understand what you mean, but i think its all opinionative.
opisthognathousHaving receding jaws
opponentCharacterized by active hostility He was a vociferous opponent of the oxford movement.
opportuneSuitable or at a time that is suitable or advantageous especially for a particular purpose The mantram is to be used frequently throughout the day, at opportune moments.
opportunistTaking immediate advantage, often unethically, of any circumstance of possible benefit Spader is creepily effective as the ladder climbing opportunist.
opportunisticTaking immediate advantage, often unethically, of any circumstance of possible benefit It is an omnivorous and opportunistic forager and feeder.
opposableCapable of being placed opposite to something The thumb is not truly opposable, but the first toe is.
opposedBeing in opposition or having an opponent The majority opposed the merger.
opposingCharacterized by active hostility The king made efforts to harmonize the opposing parties.
oppositeThe other one of a complementary pair That’s the opposite of tendentious.
oppositiveExpressing antithesis or opposition I take the oppositive approach to shroeder and beyerstein.
oppressiveMarked by unjust severity or arbitrary behavior The lakes and waterways make the atmosphere damp and oppressive.
opprobriousDeserving or bringing disgrace or shame- rachel carson The phrase is intended to be opprobrious, rather than laudatory.
optativeRelating to a mood of verbs in some languages Among these are an optative and an antipassive.
opticOf or relating to or resembling the eye Optic ataxia is the impairment of visually guided reaching.
opticalOf or relating to or involving light or optics The optical dot gain is the perimeter of the points.
optimalMost desirable possible under a restriction expressed or implied Reexamination of optimal quantum state estimation of pure states.
optimisticExpecting the best in this best of all possible worlds Also, genius, the word sanguine means cheerfully optimistic.
optimumMost desirable possible under a restriction expressed or implied Let’s put the case for the optimum layout.
optionalPossible but not necessary; left to personal choice Even in tiff and jpeg, the cm tags are optional.
opulentRich and superior in quality He is saying the ashram was opulent.

Adjectives That Start with OR (47 Words)

oracularOf or relating to an oracle In chinese traditional religion, the tortoise is an oracular animal.
oralOf or relating to or affecting or for use in the mouth Oral sex is the term given to genital stimulation by the mouth.
orangeOf the color between red and yellow; similar to the color of a ripe orange I found the orange sherbet in the fridge.
orangishOf the color between red and yellow; similar to the color of a ripe orange The contrast of the bluish glass and orangish fish is really nice.
oratoricalCharacteristic of an orator or oratory- robert graves Buffet had some oratorical talent, but shone most in opposition.
orbicularHaving the shape of a sphere or ball- zane grey The pitcher mouth is horizontal and orbicular.
orbiculateCircular or nearly circular The pitcher lid or operculum is sub orbiculate and has no appendages.
orbitalOf or relating to an orbit Endeavour delivered the expedition four crew to the orbital outpost.
orbitualDescribing a circle; moving in a circle
orchestralRelating to or composed for an orchestra Perhaps the desideratum is the early orchestral sketch ‘kinder scout’.
ordainedInvested with ministerial or priestly functions In 1961, he was ordained bishop of palmyra, in central syria.
orderedDisposed or placed in a particular kind of order He was ordered to amass the objects in array.
orderlyDevoid of violence or disruption The atmosphere is fresh and clean the environment is peaceful and orderly.
ordinalOf or relating to a taxonomic order This ordinal is relative to the complexity of the task or problem.
ordinaryNot exceptional in any way especially in quality or ability or size or degree Feelings are qualia and therefore not communicable by ordinary language.
organicSimple and healthful and close to nature In organic production, sulfur is the most important fungicide.
organicisticRelating to or tending toward organicism
organisationalOf or relating to an organization The first step is to determine the organizational structure.
organisedBeing a member of or formed into a labor union The work is organized according to workers.
organismalOf or relating to or belonging to an organism (considered as a whole) I’m also helping to sort stub articles in organismal biology and ecology.
organismicOf or relating to or belonging to an organism (considered as a whole) Mcgraw hill series in organismic biology’.
organizationalOf or relating to an organization The organizational positions of the central groups varied.
organizedBeing a member of or formed into a labor union The content of the subsections is alphabetically organized.
orgiasticUsed of riotously drunken merrymaking Philopator was devoted to orgiastic religions and to literature.
orientalDenoting or characteristic of countries of asia The architecture of the building is mixed baroque and oriental.
orientatedAdjusted or located in relation to surroundings or circumstances; sometimes used in combination The mode of teaching in the college is application oriented.
orientatingPositioning with respect to a reference system or determining your bearings physically or intellectually An automatic bowling machine is provided with means adapted to maintain the distributor belt closer than otherwise to the orientating pan.
orientedAdjusted or located in relation to surroundings or circumstances; sometimes used in combination Calisthenics is primarily oriented towards young girls.
originalNot secondhand or by way of something intermediary Japanese is the original and the original takes precedence.
originativeContaining seeds of later development
ornamentalServing an esthetic rather than a useful purpose It was an ornamental fountain.
ornateMarked by elaborate rhetoric and elaborated with decorative details-john milton The hat and ornate buttons are part of the official wardrobe.
orneryHaving a difficult and contrary disposition- dorothy sayers Some people are just ornery.
ornithologicalOf or relating to ornithology The main focus of his ornithological research was the zebra finch.
oropharyngealOf or relating to or located near the oropharynx Fusobacteria are normal inhabitants of the oropharyngeal flora.
orotundFull and rich
orphicHaving an import not apparent to the senses nor obvious to the intelligence; beyond ordinary understanding I can tell you of the orphic mysteries, the pythagorean ones, and dionysian.
orthodoxAdhering to what is commonly accepted The church is the seat of the local orthodox bishopric.
orthogonalNot pertinent to the matter under consideration Evolution is orthogonal to the origin of the common ancestors.
orthomolecularDesignating or relating to a form of treatment of mental disorders that seeks to restore biochemical balance in the body with large doses of vitamins and minerals Now treating pellagra with vitamin b is orthomolecular
orthopaedicOf or relating to orthopedics The journal of orthopaedic audit.
orthopedicOf or relating to orthopedics Stromeyer was a pioneer in orthopedics and orthopedic surgery.
orthopedicalOf or relating to orthopedics
orthopticOf or relating to normal binocular vision The orthoptic is the isoptic whose given angle is a right angle.
orthostaticPertaining to an upright standing posture Orthostatic vital signs are often used as a indicator of hypovolemia.
orthotropousCompletely straight with the micropyle at the apex
orwellianOf or relating to the works of george orwell (especially his picture of a future totalitarian state) And no one wants an orwellian definition.

Adjectives That Start with OS (11 Words)

oscineOf or relating to the songbirds
oscitantShowing lack of attention or boredom
osseousComposed of or containing bone There are two types of osseous tissue, compact and spongy.
ossicularPertaining to the ossicles in the middle ear The sound is not amplified uniformly across the ossicular chain.
ossiculatePertaining to the ossicles in the middle ear
ossiferousContaining bones (especially fossil bones)
ossifiedSet in a rigidly conventional pattern of behavior, habits, or beliefs They possess heavily ossified gastralia and dorsal osteoderms.
ostealRelating to bone or to the skeleton
ostensibleAppearing as such but not necessarily so She’s the ostensible bad girl who works in a clam shack.
ostensiveRepresented or appearing as such; pretended The ostensive reason for the complaint is that intrade has been offering off exchange options.
ostentatiousIntended to attract notice and impress others His clothes are cumbersome and ostentatious.

Adjectives That Start with OT (8 Words)

otcNot traded on a stock exchange Accounting for otc weather derivatives as a hedge.
otherNot the same one or ones already mentioned or implied- the white queen The other is the life of the person.
otherwiseOther than as supposed or expected It’s quite the understatement otherwise.
otherworldlyExisting outside of or not in accordance with nature-aldous huxley War erupted between the midkemians and the otherworldly tsurani.
oticOf or relating to near the ear The back edge of the head held a prominent otic notch behind each eye.
otioseProducing no result or effect Somehow, everything otiose takes on a colourful lilt, and all’s well, whatever.
ototoxicToxic to the organs of hearing or balance or to the auditory nerve Salicylic acid has an ototoxic effect by inhibiting prestin.
ottomanOf or relating to the ottoman empire or its people or its culture He was married to the sister of the ottoman banker in amman.

Adjectives That Start with OU (36 Words)

outNot worth considering as a possibility The pigments are home to the chlorophyll which carry out photosynthesis.
out-and-outNo longer fashionable She attempts to seduce and cajole oliver out of the tape and away from hope.
out-of-the-wayRemote from populous or much-traveled regions He shoves the cops out of the way and pounds downstairs.
outbackInaccessible and sparsely populated; He accepts, and the whole family moves to the outback.
outboardLocated away from the midline of a vessel or aircraft Infrasonic has a wide range of outboard gear and plug in effects.
outboundThat is going out or leaving There is a payphone located on the outbound platform.
outbredBred of parents not closely related; having parents of different classes or tribes They are an outbred strain that has an intact thymus and normal immune system.
outcastExcluded from a society The community was regarded as outcast, impure and untouchable.
outcasteNot belonging to or having been expelled from a caste and thus having no place or status in society Chandala here means outcaste due to their defying nature.
outclassedDecisively surpassed by something else so as to appear to be of a lower class Albatrosses have it outclassed in the wingspan stakes too.
outdatedOld; no longer valid or fashionable The interior of the farmhouse seems to be outdated.
outdoorLocated, suited for, or taking place in the open air The breed makes the ideal outdoor companion.
outdoorsyCharacteristic of or suitable to outdoor life Hugo is described as the outdoorsy type with the physique and tan to prove it .
outerBeing on the outside or further from a center The outer surface is visualized as an oblate spheroid.
outermostSituated at the farthest possible point from a center The outermost surfaces of the panel are plane.
outflowingThat is flowing outward The average quantity of outflowing air is measured.
outgoingLeaving a place or a position Palmer was a guarantor of the outgoing stephen’s safety.
outlandishConspicuously or grossly unconventional or unusual The more outlandish the claim, the harder it is to disprove.
outlawContrary to or forbidden by law The song tells the story of the outlaw couple bonnie and clyde.
outlawedContrary to or forbidden by law The congress wished to outlaw the cpusa in the communist control act of 1954.
outlyingRelatively far from a center or middle It is one of the most populous of the outlying regions of the metro area.
outmodedOut of fashion I do think the usage described in this article is outmoded.
outmostSituated at the farthest possible point from a center To einberg, service on corporate boards was of the outmost importance.
outragedAngered at something unjust or wrong His comments outraged the establishment and the general protestant community.
outrageousGrossly offensive to decency or morality; causing horror It’s lewd, lascivious, salacious, outrageous
outreConspicuously or grossly unconventional or unusual Outre philosophy never overrides mainstream science.
outriggedRigged with a structure projecting from or over the side of a boat for various purposes; to prevent capsizing or to support an oarlock or to help secure a mast etc
outrightWithout reservation or exception You won outright and deservedly.
outsideLeading to or from the outside Mort is forced to stow away on the outside of the plane.
outsizeLarger than normal for its kind The section as it stands now looks fine to me, neither outsize nor pov.
outsizedLarger than normal for its kind Brown has always had an outsized ambition, and now she is imprisoned by it.
outspokenCharacterized by directness in manner or speech; without subtlety or evasion He is popular for his outspoken ultramontane views.
outspreadFully extended in width It is topped by a silver eagle, wings outspread, standing on a world globe.
outstandingHaving a quality that thrusts itself into attention Stinchcomb was perhaps the outstanding star of the squad.
outstretchedFully extended especially in length The eagle’s wings are outstretched and its head is turned to its right.
outwardThat is going out or leaving As the drum rotates, centrifugal force pushes the flails outward.

Adjectives That Start with OV (86 Words)

ovalRounded like an egg The adult carapace is wrinkled and oval shaped.
ovarianOf or involving the ovaries Unintended oophorectomy and premature ovarian failure.
ovateOf a leaf shape; egg-shaped with the broader end at the base The aperture is small and ovate.
overHaving come or been brought to a conclusion He completed over 20 other wordless novels in his career.
over-the-counterIndicating opposition or resistance He was responsible for counter sabotage and counterespionage.
overabundantExcessively abundant The overabundant and unreliable list of post grunge bands article was deleted.
overactiveMore active than normal Hyperkinesis is a state of overactive restlessness in children.
overageToo old to be useful- anthony trollope This fee for the extra minutes is called overage fees or overage charges.
overagedToo old to be useful- anthony trollope The alloy is solution treated and overaged to provide a suitable precipitate.
overallIncluding everything Consider the overall welfare of the project
overambitiousExcessively ambitious The ace project was overambitious.
overanxiousAnxious or nervous to an excessive degree I think i got a bit overanxious here.
overarmWith hand brought forward and down from above shoulder level An occasional bowler of lobs, he sometimes switched to quick overarm deliveries.
overbearingHaving or showing arrogant superiority to and disdain of those one views as unworthy In the process, she also learns edna’s overbearing ways.
overblownPuffed up with vanity- newsweek It’s gone from underweight to, arguably, overblown in a few months.
overboldImproperly forward or bold I also used overbold language in response to one of your posts over there.
overburdenedHeavily burdened with work or cares The article will not be overburdened.
overbusyToo busy
overcarefulExcessively or unduly careful
overcastFilled or abounding with clouds The sky was overcast and misty and it was very cold.
overcautiousUnnecessarily cautious And better overcautious with references than not cautious enough.
overconfidentMarked by excessive confidence She has the tendency to be overconfident in her powers.
overcredulousToo credulous for your own good
overcriticalInclined to judge too severely I apologize for becoming overcritical of your effort.
overcuriousShowing excessive curiosity
overdelicateExtremely delicate
overdressedDressed too elaborately The jacket and tie is very easy to set aside if you feel overdressed.
overduePast due; not paid at the scheduled time By the 1950s, the building was mostly vacant and overdue for rehabilitation.
overeagerExcessively eager It all comes across to me as an overeager book report.
overemotionalExcessively or abnormally emotional It is the overemotional and man crazy men who have messed up american history.
overenthusiasticUnduly enthusiastic He was overenthusiastic and he jumped the gun.
overexcitedUnduly excited Overexcited quick hands please chill out.
overfamiliarTaking undue liberties
overfedToo well nourished Overfed fish can sometimes be recognized by feces trailing from their cloaca.
overfondExcessively fond
overfullExceeding demand The parent category isn’t overfull.
overgenerousVery generous I think in all honesty that the b rating is overgenerous.
overgreedyExcessively gluttonous
overgrownCovered with growing plants Over time, the grove became overgrown and the spring became fetid.
overhandWith hand brought forward and down from above shoulder level The double overhand knot is the opened equivalent of the cinquefoil knot.
overhandedWith hand brought forward and down from above shoulder level Darts may be thrown overhanded, underhanded or both depending on league rules.
overhastyDone with very great haste and without due deliberation- shakespeare- arthur geddes He declared, that, if he should be overhasty, he would most assuredly ruin every thing.
overheadLocated or originating from above The white flag fluttered overhead.
overheatedHeated beyond a safe or desirable point The overheated description of the commercial itself is also rubbish.
overindulgentExcessively indulgent Massie’s overindulgent and also very wealthy parents.
overjealousSuspicious or unduly suspicious or fearful of being displaced by a rival I have had my mention an copyright free picture deleted by an overjealous user.
overjoyedExtremely joyful Prithviraj was overjoyed on getting this letter.
overladenLoaded past capacity An article should not be overladen with images.
overlandTraveling or passing over land It eliminated the need for overland travel.
overlargeExcessively large It was split out simply to reduce the size of this overlarge article.
overlyingPlaced on or over something else It’s the overlying theme, after all.
overmodestAffectedly modest or shy especially in a playful or provocative way It’s not uncommon for academic biographies to be overmodest and insufficient.
overmuchVery great in quantity; overabundant I don’t really care overmuch about that.
overniceExcessively fastidious and easily disgusted
overnightLasting, open, or operating through the whole night The rush ended the depression overnight for seattle.
overpricedToo costly for the value The bid was felt by many to be overpriced.
overprotectiveOverly protective My boy here’s a little overprotective.
overproudExcessively proud
overrefinedExcessively delicate or refined
overripeToo ripe and beginning to turn soft It seems like the irony is getting a little overripe.
overseaBeing or passing over or across the sea Most of the oversea businesses are automobile trading.
overseasBeing or passing over or across the sea The success of the three clubs took the business overseas.
oversensitiveUnduly sensitive or thin-skinned Perhaps i am a bit oversensitive.
overseriousExcessively serious
oversewnSewn together with overhand stitches (close vertical stitches that pass over and draw the two edges together)
oversexedHaving excessive sexual desire or appeal Grandma is an oversexed man chaser who falls head over heels for the olf.
overshotHaving an upper part projecting beyond the lower There was an internal overshot wheel.
oversizeLarger than normal for its kind The oversize images should be rectified.
oversizedLarger than normal for its kind The article is indeed oversized and badly organised.
oversolicitousExcessively solicitous
overstrungToo tightly strung
overstuffedUpholstered thickly and deeply Home furnishing was not necessarily ornate or overstuffed.
oversubscribedSold in excess of available supply especially season tickets The initial stock placement was heavily oversubscribed.
oversuspiciousUnduly suspicious I’m at a loss, and probably oversuspicious.
overtOpen and observable; not secret or hidden Your overt hostility is unwarranted and unappreciated.
overvaliantHaving or showing undue valor or boldness
overweeningPresumptuously arrogant- s.v.benet- ny times What might seem like overweening ambition is actually a patriotic chore.
overweightUsually describes a large person who is fat but has a large frame to carry it For instance, the people in the strips were often overweight.
overwhelmingSo strong as to be irresistible That was the overwhelming vibe.
overwroughtDeeply agitated especially from emotion I think some of the indignation displayed by others was overwrought.
overzealousMarked by excessive enthusiasm for and intense devotion to a cause or idea Perhaps you are just overzealous.
oviformRounded like an egg
ovineOf or pertaining to or of the nature of or characteristic of a sheep or sheep It has polar fimbriae and is the causative agent of ovine foot rot.
oviparousEgg-laying Most of these species are oviparous.
ovoidRounded like an egg The olives are of medium weight, ovoid shape and asymmetrical.
ovoviviparousProducing living young from eggs that hatch within the body Fish in the subfamily anablepinae are ovoviviparous.

Adjectives That Start with OW, OX (8 Words)

owingOwed as a debt Owing to the unusually heavy downpour many tunnels had overflowed.
owlishResembling an owl; solemn and wise in appearance This is just owlish showing off.
ownBelonging to or on behalf of a specified person (especially yourself); preceded by a possessive He is able to hold his own in conversation with the wily smaug.
ownedHaving an owner; often used in combination Time was, the old serf owned nothing.
ownerlessHaving no owner The team was essentially ownerless, being owned by the league.
oxidativeTaking place in the presence of oxygen The strong oxidative effect leads to necrosis of the mucous membrane.
oxidisedCombined with or having undergone a chemical reaction with oxygen The iron oxidised to form hematite.
oxidizableCapable of undergoing a chemical reaction with oxygen It is thus possible to oxidize all the residual oxidizable material.

We hope our list of O adjectives will be helpful. Remember to use adjectives in your writing or speech to express your thoughts clearly and impress your listeners or readers.

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