62 entries under clandestine topic. ×

10
camouflaged(verb, adjective, quiet, obscure, secret)
10
furtive(adjective, strange, secret, sneaky)
10
mystical(adjective, hard, evil, obscure, strange)
9
disguised(verb, adjective, obscure, secret, unknown)
8
hush-hush(adjective, quiet, separate, reserved, secret)
8
shrouded(adjective, obscure, dark, secret)
8
undercover(adjective, secret, spy, underground)
7
deep(adjective, hard, evil, obscure, complex)
7
stealthy(adjective, secret, private, concealed)
6
close(adjective, quiet, solid, humble, shy)
5
underhand(adjective, secret, private, sneaky)
4
restricted(underground, undisclosed)
4
secretive(adjective, quiet, obscure, plain, strange)
3
out-of-the-way(adjective, close, quiet, separate, shy)
3
sneaky(adjective, secret, private, underground)
3
unintelligible(adjective, hard, obscure, solid, dark)
3
unpublished(adjective, underground, undisclosed)
2
ambiguous(adjective, cover, obscure, dark, doubtful)
2
backstairs(unknowing, underground, undisclosed, hermetical)
2
classified(personal, underground, undisclosed, confidential)
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APASmart Define. (2015). hidden thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/hidden/thesaurus/synonyms
ChicagoSmart Define. 2015. "hidden thesaurus" https://smartdefine.org/hidden/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, hidden thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/hidden/thesaurus/synonyms>.
MLASmart Define. "hidden thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/hidden/thesaurus/synonyms>