Synonyms|382Antonyms|120|Broader|6Narrower|0Related|370
1
stealth(noun, secret, hidden, spy, covert)
1
stealthily(adverb, secretly, slyly, underhandedly, surreptitiously)
1
sub-rosa(dishonest, cunning, deceitful, secret, sneaky)
1
subterranean
1
treacherous(dishonest, cunning, deceitful, sneaky, underhanded)
1
tricky(dishonest, cunning, deceitful, sneaky, underhanded)
1
two-faced(dishonest, cunning, deceitful, sneaky, underhanded)
1
two-timing(dishonest, cunning, deceitful, sneaky, underhanded)
1
ulterior
1
unapparent(adjective, latent)
1
unauthorized(secret, private, hidden, sneaky, covert)
1
unavowed
1
under cover(expression, adjective, secret, spy, covert)
1
under the radar
1
unethical(dishonest, cunning, deceitful, sneaky, underhanded)
1
unfair(dishonest, cunning, deceitful, sneaky, underhanded)
1
unidentified
1
unobservable(adjective, latent)
1
unobtrusive
1
unofficial(adjective, special, intimate, personal, confidential)
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APASmart Define. (2015). clandestine thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/clandestine/thesaurus/synonyms
ChicagoSmart Define. 2015. "clandestine thesaurus" https://smartdefine.org/clandestine/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, clandestine thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/clandestine/thesaurus/synonyms>.
MLASmart Define. "clandestine thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/clandestine/thesaurus/synonyms>