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

Need another word that means the same as “undercover”? Find 14 synonyms and 30 related words for “undercover” in this overview.

The synonyms of “Undercover” are: clandestine, hugger-mugger, hush-hush, secret, surreptitious, underground, covert, private, confidential, conspiratorial, furtive, backstair, stealthy, closet

Undercover as an Adjective

Definitions of "Undercover" as an adjective

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

• Conducted with or marked by hidden aims or methods.
• Involving secret work within a community or organization, especially for the purposes of police investigation or espionage.

Synonyms of "Undercover" as an adjective (14 Words)

backstair	Secret and sly or sordid. Backstairs intimacies.
clandestine	Conducted with or marked by hidden aims or methods. Clandestine intelligence operations.
closet	Secret; covert. A closet smoker.
confidential	The level of official classification for documents next above restricted and below secret; available only to persons authorized to see documents so classified. Confidential information.
conspiratorial	Relating to or characteristic of conspiracy or conspirators. He gave me a sly conspiratorial wink.
covert	(of a wife) being under the protection of her husband. Covert actions by the CIA.
furtive	Attempting to avoid notice or attention, typically because of guilt or a belief that discovery would lead to trouble; secretive. They spent a furtive day together.
hugger-mugger	In utter disorder.
hush-hush	Conducted with or marked by hidden aims or methods.
private	Concerning things deeply private and personal. Private discussions.
secret	Given in confidence or in secret. Secret ingredients.
stealthy	Behaving or done in a cautious and surreptitious manner, so as not to be seen or heard. Stealthy footsteps.
surreptitious	Marked by quiet and caution and secrecy; taking pains to avoid being observed. Surreptitious mobilization of troops.
underground	Under the level of the ground. An underground car park.

Usage Examples of "Undercover" as an adjective

• He worked undercover in Northern Ireland.
• An undercover investigation.
• An undercover police operation.

Associations of "Undercover" (30 Words)

clandestine	Kept secret or done secretively, especially because illicit. Clandestine intelligence operations.
concealed	Kept secret; hidden. A concealed weapon.
concealment	The action of hiding something or preventing it from being known. The deliberate concealment of material facts.
covert	A flock of coots. The brush provided a covert for game.
crypt	An underground room or vault beneath a church, used as a chapel or burial place.
defector	A person who abandons their duty (as on a military post. Staff interviewed escapees and defectors to the West.
den	Of a wild animal live in a den. A den of iniquity.
disguised	Having its true character concealed with the intent of misleading. A disguised reporter.
esoterica	Esoteric or highly specialized subjects or publications. A professor of such esoterica as angelology and comparative shamanism.
espionage	The systematic use of spies to get military or political secrets. The camouflage and secrecy of espionage.
furtive	Suggestive of guilty nervousness. A furtive manner.
hidden	Not accessible to view. Her hidden feelings.
infiltrate	Enter or gain access to (an organization, place, etc.) surreptitiously and gradually, especially in order to acquire secret information. A chest radiograph revealed a patchy infiltrate in the left lower lobes.
infiltration	Permeation of a liquid into something by filtration. Cross border infiltrations.
investigate	Investigate scientifically. When you didn t turn up I thought I d better come back to investigate.
lair	A burial plot in a graveyard. Their ashes now lie buried in a lair in the Glasgow necropolis.
operative	Performing or capable of performing. I was madly the operative word in love.
secrecy	The action of keeping something secret or the state of being kept secret. The bidding is conducted in secrecy.
secret	Given in confidence or in secret. A secret marriage.
secretive	Inclined to secrecy or reticence about divulging information. Secretive deals.
sensitization	The state of being sensitive (as to an antigen. Too much silver nitrate would cause improper sensitization of the plates placed in it.
sly	(of an action) surreptitious. He gave a sly grin.
sneak	Someone who prowls or sneaks about usually with unlawful intentions. A sneak attack.
spy	A secret agent hired by a state to obtain information about its enemies or by a business to obtain industrial secrets from competitors. He could spy a figure in the distance.
stealthy	Behaving or done in a cautious and surreptitious manner, so as not to be seen or heard. Stealthy footsteps.
subterranean	Lying beyond what is openly revealed or avowed (especially being kept in the background or deliberately concealed. The terrors and hazards of subterranean exploration.
surreptitious	Marked by quiet and caution and secrecy; taking pains to avoid being observed. A surreptitious glance at his watch.
ulterior	Beyond or outside an area of immediate interest; remote- G.B.Shaw. Without any purpose immediate or ulterior.
underground	A member of an underground political group or movement. In Paris the subway system is called the metro and in London it is called the tube or the underground.
underhanded	Marked by deception. Underhanded practices.