Synonyms|410Antonyms|71|Broader|1Narrower|7Related|371

35 entries under private topic. ×

8
hole-and-corner(adjective, secret, hidden, spy)
4
backstairs(adjective, mysterious, reticent, taciturn)
3
mysterious(adjective, quiet, secret, reticent)
3
skulking(adjective, secret, hidden, sneak)
3
sneaking(adjective, dishonest, cunning, deceitful, secret)
2
close(mysterious, reticent, unknown, hidden)
2
cryptic(adjective, mysterious, reticent, unknown)
2
feline(mysterious, reticent, taciturn, covert)
2
on the QT(expression, adjective, idiom, adverb, dishonest)
2
slinking(secret, hidden, sneak, sneaky)
2
sub-rosa(adjective, dishonest, cunning, deceitful, secret)
2
under-the-table(secret, hidden, clandestine, sneaky)
2
veiled(obscure, secret, unknown, hidden)
1
buttoned up(expression, mysterious, reticent, taciturn)
1
cagey(mysterious, reticent, taciturn, covert)
1
cautious(mysterious, reticent, sneaky, covert)
1
clammed up(expression, mysterious, reticent, taciturn)
1
close-mouthed(mysterious, reticent, taciturn, uncommunicative)
1
enigmatic(mysterious, reticent, taciturn, sneak)
1
fraudulent(dishonest, cunning, deceitful, secret)
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APASmart Define. (2015). undercover thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/undercover/thesaurus/synonyms
ChicagoSmart Define. 2015. "undercover thesaurus" https://smartdefine.org/undercover/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, undercover thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/undercover/thesaurus/synonyms>.
MLASmart Define. "undercover thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/undercover/thesaurus/synonyms>