62 entries under clandestine topic. ×

7
secretive(adjective, mean, smooth, secret)
5
shrouded(adjective, obscure, dark, secret, hidden)
5
sly(adjective, quiet, mean, clever, secret)
5
sneak(secret, underground, undisclosed)
5
sneaky(adjective, quiet, mean, secret, sly)
5
under wraps(expression, adjective, idiom, show, secret)
5
backstairs(adjective, mysterious, private, reticent, taciturn)
5
under-the-table(adjective, secret, private, hidden)
5
underhanded(adjective, dishonest, deceitful, secret)
4
arcane(adjective, strange, secret, underground)
4
cloak-and-dagger(adjective, show, full, secret)
4
sub rosa(adjective, show, underhanded)
3
classified(adjective, secret, underground, undisclosed)
3
restricted(adjective, secret, underground, undisclosed)
2
close(quiet, secret, reticent, hidden, taciturn)
2
conspiratorial(adjective, underground, undisclosed, sneaky)
2
discreet(underground, undisclosed)
2
dissembled(adjective, secret, underground, undisclosed)
2
dissimulated(underground, undisclosed)
2
incognito(adjective, secret, hidden, underhanded)
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APASmart Define. (2015). covert thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/covert/thesaurus/synonyms
ChicagoSmart Define. 2015. "covert thesaurus" https://smartdefine.org/covert/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, covert thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/covert/thesaurus/synonyms>.
MLASmart Define. "covert thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/covert/thesaurus/synonyms>