Synonyms|358Antonyms|72|Broader|2Narrower|0Related|322

52 entries under clandestine topic. ×

3
classified(secret, underground, undisclosed, top-secret)
3
closet(noun, adjective, secret, underground)
3
conspiratorial(adjective, underground, undisclosed, sneaky)
3
in ambush(expression, underground, undisclosed)
3
sub-rosa(adjective, dishonest, cunning, secret)
2
inside(underground, undisclosed)
1
backdoor(underground, undisclosed)
1
camouflaged(secret, hidden, underground, undisclosed)
1
cloaked(secret, unknown, hidden, concealed)
1
cryptic(secret, unknown, hidden, concealed)
1
discreet(underground, undisclosed)
1
dissembled(secret, hidden, underground, undisclosed)
1
dissimulated(underground, undisclosed)
1
incognito(secret, hidden, spy, underground)
1
shrouded(secret, unknown, hidden, concealed)
1
top secret(expression, idiom, underground, undisclosed)
1
unacknowledged(underground, undisclosed)
1
under false pretense(expression, idiom, underground, undisclosed)
1
unknown(secret, hidden, underground, concealed)
0
arcane(underground, undisclosed)
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ChicagoSmart Define. 2015. "surreptitious thesaurus" https://smartdefine.org/surreptitious/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, surreptitious thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/surreptitious/thesaurus/synonyms>.
MLASmart Define. "surreptitious thesaurus" 13 April 2015. Web. 29 September 2026. <https://smartdefine.org/surreptitious/thesaurus/synonyms>