IRRATIONAL: Synonyms and Related Words. What is Another Word for IRRATIONAL?

Need another word that means the same as “irrational”? Find 8 synonyms and 30 related words for “irrational” in this overview.

The synonyms of “Irrational” are: unreasonable, illogical, groundless, baseless, unfounded, unjustifiable, unsound, irrational number

Irrational as a Noun

Definitions of "Irrational" as a noun

According to the Oxford Dictionary of English, “irrational” as a noun can have the following definitions:

  • A real number that cannot be expressed as a rational number.
  • An irrational number or quantity; a surd.

Synonyms of "Irrational" as a noun (1 Word)

irrational numberA real number that cannot be expressed as a rational number.

Irrational as an Adjective

Definitions of "Irrational" as an adjective

According to the Oxford Dictionary of English, “irrational” as an adjective can have the following definitions:

  • Not logical or reasonable.
  • Not consistent with or using reason.
  • Not endowed with the power of reason.
  • (of a number, quantity, or expression) not expressible as a ratio of two integers, and having an infinite and non-recurring expansion when expressed as a decimal. Examples of irrational numbers are the number π and the square root of 2.
  • Real but not expressible as the quotient of two integers.

Synonyms of "Irrational" as an adjective (7 Words)

baselessWithout foundation in fact.
Baseless allegations.
groundlessNot based on any good reason.
The allegations proved groundless.
illogicalLacking in correct logical relation.
An illogical fear of the supernatural.
unfoundedHaving no foundation or basis in fact.
Her fear that she had cancer was unfounded.
unjustifiableNot able to be shown to be right or reasonable.
An unjustifiable restriction on their freedom.
unreasonableBeyond the limits of acceptability or fairness.
She knew she was being unreasonable but she resented his domesticity.
unsoundPhysically unsound or diseased.
This line of argument is unsound.

Usage Examples of "Irrational" as an adjective

  • Irrational animals.
  • Irrational fears.
  • Irrational numbers.
  • Irrational feelings of hostility.

Associations of "Irrational" (30 Words)

absurdAn absurd state of affairs.
The incidents that followed bordered on the absurd.
absurdityThe quality or state of being ridiculous or wildly unreasonable.
The crowd laughed at the absurdity of the clown s behavior.
disorderedNot arranged in order.
She went to comb her disordered hair.
foolishDevoid of good sense or judgment.
He was foolish enough to confide in her.
funnyExperiencing odd bodily sensations.
Up to some funny business.
garbledLacking orderly continuity.
I got a garbled set of directions.
illogicalLacking orderly continuity.
An illogical fear of the supernatural.
inadvisableNot prudent or wise; not recommended.
Running on the ice is inadvisable.
incoherentNot logical or internally consistent.
Incoherent with grief.
incongruent(of melting, dissolution, or other process) affecting the components of an alloy or other substance differently.
incongruityThe quality of disagreeing; being unsuitable and inappropriate.
The incongruity of his fleshy face and skinny body disturbed her.
incongruousNot in harmony or keeping with the surroundings or other aspects of something.
The duffel coat looked incongruous with the black dress she wore underneath.
indefensibleNot justifiable by argument.
The towns were tactically indefensible.
inexcusableToo bad to be justified or tolerated.
Matt s behaviour was inexcusable.
injudiciousShowing very poor judgement; unwise.
An injudicious measure.
inordinateUnusually or disproportionately large; excessive.
A book of inordinate length.
ludicrousBroadly or extravagantly humorous; resembling farce.
Every night he wore a ludicrous outfit.
nonsenseSpoken or written words that have no meaning or make no sense.
He was talking absolute nonsense.
prattleTalk at length in a foolish or inconsequential way.
She began to prattle on about her visit to the dentist.
preposterousSo unreasonable as to invite derision.
A preposterous suggestion.
ridiculousDeserving or inviting derision or mockery; absurd.
That ridiculous tartan cap.
sillyDazed from or as if from repeated blows.
Don t be silly she said.
superstitiousHaving or showing a belief in superstitions.
Many superstitious beliefs and practices are connected with sneezing.
unfoundedHaving no foundation or basis in fact.
Her fear that she had cancer was unfounded.
unjustifiableIncapable of being justified or explained.
An unjustifiable restriction on their freedom.
unjustifiedLacking justification or authorization.
Unjustified price increases.
unreasonableBeyond normal limits.
An unreasonable request.
untenable(of theories etc) incapable of being defended or justified.
This argument is clearly untenable.
unwarrantedLacking justification or authorization.
Unwarranted jealousy.
unwiseShowing or resulting from lack of judgment or wisdom.
An unwise investor is soon impoverished.

Leave a Comment