Synonyms of the word

covert

• adj. (now rare) Hidden, covered over; overgrown, sheltered.
• adj. (figuratively) Secret, surreptitious, concealed.
• n. A covering.
• n. A disguise.
• n. A hiding place.
• n. Area of thick undergrowth where animals hide.
• n. (ornithology) A feather that covers the bases of flight feathers.

backstair

• adj. clandestine, secret or furtive.
• n. The backstairs (stairs at the rear of a building).

backstairs

• n. A staircase at the rear of a building or one normally only used by servants and tradesmen.
• n. An indirect or furtive means of access or intercourse.
• adj. Secret or furtive.
• adj. Scandalous.

behind-the-scenes

• adj. Alternative spelling of behind the scenes.

black

• adj. (of an object) Absorbing all light and reflecting none; dark and hueless.
• adj. (of a place, etc) Without light.
• adj. (sometimes capitalized) Of or relating to any of various ethnic groups having dark pigmentation of the…
• adj. (chiefly historical) Designated for use by those ethnic groups which have dark pigmentation of the skin.
• adj. (card games, of a card) Of the spades or clubs suits. Compare red (“of the hearts or diamonds suit”).
• adj. Bad; evil; ill-omened.
• adj. Expressing menace, or discontent; threatening; sullen.
• adj. Illegitimate, illegal or disgraced.
• adj. (Ireland, informal) Overcrowded.
• adj. (of coffee or tea) Without any cream, milk, or creamer.
• adj. (board games, chess) Of or relating to the playing pieces of a board game deemed to belong to the "black"…
• adj. (typography) Said of a symbol or character that is solid, filled with color. Compare white (“said of a…
• adj. (politics) Related to the Christian Democratic Union of Germany.
• adj. Relating to an initiative whose existence or exact nature must remain withheld from the general public.
• n. (countable and uncountable) The colour/color perceived in the absence of light, but also when no light…
• n. (countable and uncountable) A black dye or pigment.
• n. (countable) A pen, pencil, crayon, etc., made of black pigment.
• n. (in the plural) Black cloth hung up at funerals.
• n. (sometimes capitalised, countable) A person of African, Aborigine, or Maori descent; a dark-skinned person.
• n. (billiards, snooker, pool, with the, countable) The black ball.
• n. (baseball, countable) The edge of home plate.
• n. (Britain, countable) a type of firecracker that is really more dark brown in colour.
• n. (informal, countable) blackcurrant syrup (in mixed drinks, e.g. snakebite and black, cider and black).
• n. (in chess and similar games, countable) The person playing with the black set of pieces.
• n. (countable) Part of a thing which is distinguished from the rest by being black.
• n. (obsolete, countable) A stain; a spot.
• v. To make black, to blacken.
• v. To apply blacking to something.
• v. (Britain) To boycott something or someone, usually as part of an industrial dispute.

clandestine

• adj. Done or kept in secret, sometimes to conceal an illicit or improper purpose.
• adj. (freemasonry, of a person or lodge) Not recognized as a regular member.

cloak-and-dagger

• adj. Marked by menacing furtive secrecy, often with a melodramatic tint or espionage involved.

cloaked

• adj. Wearing a cloak.
• adj. Covered, hidden, disguised.
• v. simple past tense and past participle of cloak.

collusive

• adj. secretly acting together for a fraudulent or illegal purpose.

concealed

• v. simple past tense and past participle of conceal.

concealment

• n. The practice of keeping secrets.
• n. The condition of being hidden or concealed.
• n. (military) protection from observation or surveillance.

conniving

• v. present participle of connive.
• adj. That connives; conspiratorial.

cover

• n. A lid.
• n. A hiding from view.
• n. A front and back of a book, magazine, CD package, etc.
• n. A top sheet of a bed.
• n. A cover charge.
• n. A setting at a restaurant table or formal dinner.
• n. (music) A rerecording of a previously recorded song; a cover version; a cover song.
• n. (cricket) A fielding position on the off side, between point and mid off, about 30° forward of square;…
• n. (topology) A set (more often known as a family) of sets, whose union contains the given set.
• n. (philately) An envelope complete with stamps and postmarks etc.
• n. (military) A solid object, including terrain, that provides protection from enemy fire.
• n. (law) In commercial law, a buyer’s purchase on the open market of goods similar or identical to the goods…
• n. (insurance) An insurance contract; coverage by an insurance contract.
• n. (espionage) A persona maintained by a spy or undercover operative, cover story.
• n. The portion of a slate, tile, or shingle that is hidden by the overlap of the course above.
• n. In a steam engine, the lap of a slide valve.
• adj. Of or pertaining to the front cover of a book or magazine.
• adj. (music) Of, pertaining to, or consisting of cover versions.
• v. (transitive) To place something over or upon, as to conceal or protect.
• v. (transitive) To be over or upon, as to conceal or protect.
• v. (transitive) To be upon all of, so as to completely conceal.
• v. (transitive) To set upon all of, so as to completely conceal.
• v. (transitive) To invest (oneself with something); to bring upon (oneself).
• v. (of a publication) To discuss thoroughly; to provide coverage of.
• v. To deal with.
• v. To be enough money for.
• v. (intransitive) To act as a replacement.
• v. (transitive) To have as an assignment or responsibility.
• v. (music) To make a cover version of (a song that was originally recorded by another artist).
• v. (military, law enforcement) To protect using an aimed firearm and the threat of firing; or to protect…
• v. To provide insurance coverage for.
• v. To copulate with (said of certain male animals such as dogs and horses).
• v. (chess, transitive) To protect or control (a piece or square).
• v. To extend over a given period of time or range, to occupy, to stretch over a given area.

covering

• n. (countable) That which covers something.
• n. (uncountable) Action of the verb to cover.
• v. present participle of cover.

disguised

• v. simple past tense and past participle of disguise.

flock

• n. A large number of birds, especially those gathered together for the purpose of migration.
• n. A large number of animals, especially sheep or goats kept together.
• n. Those served by a particular pastor or shepherd.
• n. A large number of people.
• v. (intransitive) To congregate in or head towards a place in large numbers.
• v. (transitive, obsolete) To flock to; to crowd.
• v. To treat a pool with chemicals to remove suspended particles.
• n. Coarse tufts of wool or cotton used in bedding.
• n. A lock of wool or hair.
• n. Very fine sifted woollen refuse, especially that from shearing the nap of cloths, formerly used as a coating…
• v. (transitive) To coat a surface with dense fibers or particles.

furtive

• adj. Stealthy.
• adj. Exhibiting guilty or evasive secrecy.

hole-and-corner

• adj. Conducted in secret; clandestine.

hugger-mugger

• adj. Secret, clandestine, sly.
• adj. Disorderly, chaotic, confused.
• n. (archaic) Secrecy.
• n. Disorder.
• adv. Secretly.
• adv. Confusedly, in a muddle.

hush-hush

• adj. Secret, not spoken of (or spoken of only in hushed whispers between insiders).
• n. secrecy; covert operation.

implicit

• adj. Implied indirectly, without being directly expressed.
• adj. Contained in the essential nature of something but not openly shown.
• adj. Having no reservations or doubts; unquestioning or unconditional; usually said of faith or trust.
• adj. (obsolete) entangled, twisted together.

inexplicit

• adj. Not explicit.

invisible

• adj. Unable to be seen; out of sight; not visible.
• adj. Not appearing on the surface.
• adj. (Internet) Apparently, but not actually, offline.
• adj. (psychology) That is ignored by a person.
• v. To invisiblize.
• n. (obsolete) An invisible person or thing; specifically, God, the Supreme Being.
• n. (obsolete) A Rosicrucian; so called because avoiding declaration of his craft.
• n. (obsolete) One of those (as in the 16th century) who denied the visibility of the church.

masked

• v. simple past tense and past participle of mask.
• adj. Wearing a mask or masks; characterized by masks; concealed; hidden.
• adj. (botany) personate.
• adj. (zoology) Having the anterior part of the head differing decidedly in color from the rest of the plumage;…

protected

• adj. defended.
• adj. (programming, of a variable, method, etc.) Having the protected access modifier, indicating that a program…
• v. simple past tense and past participle of protect.

screen

• n. A physical divider intended to block an area from view, or provide shelter from something dangerous.
• n. A material woven from fine wires intended to block animals or large particles from passing while allowing…
• n. The informational viewing area of electronic output devices; the result of the output.
• n. The viewing surface or area of a movie, or moving picture or slide presentation.
• n. One of the individual regions of a video game, etc. divided into separate screens.
• n. (basketball) An offensive tactic in which a player stands so as to block a defender from reaching a teammate.
• n. (baseball) The protective netting which protects the audience from flying objects.
• n. (cricket) An erection of white canvas or wood placed on the boundary opposite a batsman to make the ball…
• n. (mining, quarrying) A frame supporting a mesh of bars or wires used to classify fragments of stone by…
• n. (printing) A stencil upon a framed mesh through which paint is forced onto printed-on material; the frame…
• n. (nautical) A collection of less-valuable vessels that travel with a more valuable one for the latter's…
• n. (architecture) A dwarf wall or partition carried up to a certain height for separation and protection,…
• n. (genetics) A technique used to identify genes so as to study gene functions.
• v. To filter by passing through a screen.
• v. To remove information, or censor intellectual material from viewing.
• v. (film, television) To present publicly (on the screen).
• v. To fit with a screen.
• v. To examine patients or treat a sample in order to detect a chemical or a disease, or to assess susceptibility…
• v. To search chemical libraries by means of a computational technique in order to identify chemical compounds…

secret

• n. (countable, uncountable) Knowledge that is hidden and intended to be kept hidden.
• n. (uncountable) Something not understood or known.
• n. (archaic, in the plural) The genital organs.
• adj. Being or kept hidden.
• adj. (obsolete) Withdrawn from general intercourse or notice; in retirement or secrecy; secluded.
• adj. (obsolete) Faithful to a secret; not inclined to divulge or betray confidence; secretive.
• adj. (obsolete) Separate; distinct.
• v. (transitive) To make or keep secret.
• v. (transitive) To hide secretly.

secure

• adj. Free from attack or danger; protected.
• adj. Free from the danger of theft; safe.
• adj. Free from the risk of eavesdropping, interception or discovery; secret.
• adj. Free from anxiety or doubt; unafraid.
• adj. Firm and not likely to fail; stable.
• adj. Free from the risk of financial loss; reliable.
• adj. Confident in opinion; not entertaining, or not having reason to entertain, doubt; certain; sure; commonly…
• adj. Overconfident; incautious; careless.
• v. To make safe; to relieve from apprehensions of, or exposure to, danger; to guard; to protect.
• v. To put beyond hazard of losing or of not receiving; to make certain; to assure; frequently with against…
• v. To make fast; to close or confine effectually; to render incapable of getting loose or escaping.
• v. To get possession of; to make oneself secure of; to acquire certainly.

subterranean

• adj. below ground, under the earth, underground.

subterraneous

• adj. Subterranean.

surreptitious

• adj. Stealthy, furtive, well hidden, covert (especially movements).

ulterior

• adj. Situated beyond, or on the farther side.
• adj. Beyond what is obvious or evident.
• adj. Being intentionally concealed so as to deceive.
• adj. (archaic) Happening later; subsequent.

under-the-table

• adj. Alternative spelling of under the table; in attributive use.

undercover

• adj. Performed or happening in secret.
• adj. Employed or engaged in spying or secret investigation.
• n. A person who works undercover.

underground

• adj. (not comparable) Below the ground; below the surface of the Earth.
• adj. Hidden, furtive, secretive.
• adj. Of music, art, etc, outside the mainstream.
• adv. Below the ground.
• adv. Secretly.
• n. (chiefly Britain) An underground railway.
• n. (with "the") A movement or organisation of people who resist political convention.
• n. (with "the") A movement or organisation of people who resist artistic convention.
• v. To route electricity distribution cables underground.

undisclosed

• adj. Not disclosed; kept secret.

unrevealed

• adj. Not revealed; hidden; secret.

unseeable

• adj. invisible.
• adj. unimaginable.