Synonyms of the word

concealed

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

bushwhacking

• n. travelling through thick wooded country, cutting away scrub to make progress.
• n. fighting, as a guerilla, especially in wooded country.
• n. criticizing, by someone or a person(s), on policies and stances by George W. Bush, in forums and discussions.
• v. present participle of bushwhack.

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.

dark

• adj. Having an absolute or (more often) relative lack of light.
• adj. (of colour) Dull or deeper in hue; not bright or light.
• adj. Hidden, secret, obscure.
• adj. Without moral or spiritual light; sinister, malign.
• adj. Conducive to hopelessness; depressing or bleak.
• adj. Lacking progress in science or the arts; said of a time period.
• adj. With emphasis placed on the unpleasant aspects of life; said of a work of fiction, a work of nonfiction…
• n. A complete or (more often) partial absence of light.
• n. (uncountable) Ignorance.
• n. (uncountable) Nightfall.
• n. A dark shade or dark passage in a painting, engraving, etc.

furtive

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

hidden

• v. past participle of hide.
• adj. That has been moved out of sight. Invisible or unapparent.
• adj. Obscure.
• adj. That has been hidden.

incognito

• adj. without being known; in disguise; in an assumed character, or under an assumed title.
• adv. Without revealing one's identity.
• n. One unknown or in disguise, or under an assumed character or name.
• n. The assumption of disguise or of a feigned character; the state of being in disguise or not recognized.

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.

obscure

• adj. Dark, faint or indistinct.
• adj. Hidden, out of sight or inconspicuous.
• adj. difficult to understand.
• adj. not well-known.
• v. (transitive) To render obscure; to darken; to make dim; to keep in the dark; to hide; to make less visible,…
• v. (transitive) To hide, put out of sight etc.
• v. (intransitive, obsolete) To conceal oneself; to hide.

sealed

• v. simple past tense and past participle of seal.
• adj. Closed by a seal.
• adj. Preventing entrance.
• adj. Of a road that has a asphalt or macadamised surface.
• adj. (object-oriented programming) Not subclassable; from which one cannot inherit.

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.

sneak

• n. One who sneaks; one who moves stealthily to acquire an item or information.
• n. A cheat; a con artist; a trickster.
• n. An informer; a tell-tale.
• n. (obsolete, cricket) A ball bowled so as to roll along the ground; a daisy-cutter.
• n. (US) A sneaker; a tennis shoe.
• v. (intransitive) To creep or go stealthily; to come or go while trying to avoid detection, as a person who…
• v. (transitive) To take something stealthily without permission.
• v. (transitive, dated) To hide, especially in a mean or cowardly manner.
• v. (intransitive) (informal, especially with on) To inform an authority about another's misdemeanours; to…
• adj. In advance; before release to the general public.
• adj. In a stealthy or surreptitious manner.

sneaking

• v. present participle of sneak.
• n. The act of one who sneaks.

sneaky

• adj. Difficult to catch due to constantly outwitting the adversaries.
• adj. Dishonest; deceitful.

stealthy

• adj. Characterized by or resembling stealth or secrecy.

surreptitious

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

unavowed

• adj. Not avowed.

unseeable

• adj. invisible.
• adj. unimaginable.