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