Synonyms|382Antonyms|120|Broader|6Narrower|0Related|370
2
surreptitiously(adverb, secretly, slyly, underhandedly)
2
top secret(expression, underground, undisclosed)
2
under-the-counter(adjective, secret, sly)
2
under-the-table(secret, private, hidden, underground, sneaky)
2
underneath(secret, hidden, spy, covert)
2
undisclosed(adjective, secret, unknown, hidden, personal)
2
unknown(adjective, secret, hidden, underground, concealed)
2
unseen(secret, unknown, hidden, underground, concealed)
1
QT
1
abstruse(secret, unknown, hidden, underground, concealed)
1
back door
1
backstage
1
behind-the-scenes
1
belowground
1
by stealth(expression, adverb, secretly, slyly, underhandedly)
1
cabalistic
1
cabinet
1
cautious(adjective, sneaky, covert, secretive)
1
circuitous
1
clandestinely(adverb, secretly, slyly, 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>