Synonyms|410Antonyms|71|Broader|1Narrower|7Related|371
1
buttoned up(expression, mysterious, private, reticent, taciturn)
1
by stealth(expression, adverb, clandestine, secretly, underhandedly)
1
cabinet
1
cagey(mysterious, private, reticent, taciturn, covert)
1
camouflaged(obscure, secret, hidden, clandestine, indirect)
1
cased
1
cautious(mysterious, private, reticent, sneaky, covert)
1
ceiled
1
clammed up(expression, mysterious, private, reticent, taciturn)
1
close-mouthed(mysterious, private, reticent, taciturn, uncommunicative)
1
clouds
1
coated
1
conspiratorial(clandestine, underground, undisclosed, sneaky, covert)
1
coped
1
cowled
1
crafty(dishonest, cunning, deceitful, sneaky, underhanded)
1
cunning(dishonest, deceitful, sneaky, underhanded, covert)
1
curtained
1
deep(adjective, clandestine, underground, undisclosed)
1
disguise
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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>