Synonyms|382Antonyms|120|Broader|6Narrower|0Related|370
1
hush hush(expression, idiom)
1
illegal
1
illegitimate(adjective, secret, sly)
1
improper(adjective, immoral, illicit)
1
in camera(expression, adverb, secretly, slyly, underhandedly)
1
in holes and corners(expression, adjective, adverb, secret, sly)
1
in petto(expression, idiom, concealment)
1
indirect(dishonest, cunning, deceitful, sneaky, underhanded)
1
inviolate
1
inwardly
1
lurking
1
masked(secret, unknown, hidden, concealed, underhanded)
1
off the record(expression, adjective, special, intimate, personal)
1
on the sly(expression, adjective, idiom, adverb, secret)
1
pirate
1
privately(adverb, secretly, slyly, underhandedly, surreptitiously)
1
sequestered(secret, unknown, hidden, personal, concealed)
1
shady(dishonest, cunning, deceitful, sneaky, underhanded)
1
silent(adjective, sneak, skulking)
1
slyly(adverb, secretly, underhandedly, surreptitiously)
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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>