52 entries under hidden topic. ×

36
secret(adjective, quiet, show, dishonest, deceitful)
26
covert(adjective, show, secret, private, restricted)
20
surreptitious(adjective, dishonest, deceitful, secret)
17
undercover(adjective, adverb, show, dishonest, secret)
17
concealed(adjective, obscure, secret, unknown)
15
private(adjective, intimate, secret, unknown)
15
stealthy(adjective, quiet, dishonest, secret)
14
hush-hush(adjective, adverb, show, informal, dishonest)
11
confidential(adjective, special, intimate, secret)
11
underground(adjective, secret, unknown, sly)
10
cryptic(adjective, secret, unknown, concealed)
10
hole-and-corner(adjective, secret, private, spy)
8
arcane(adjective, secret, underground, undisclosed)
7
privy(adjective, special, intimate, secret)
6
veiled(adjective, secret, private, unknown)
5
dark(adjective, feature, obscure, mysterious)
5
occult(noun, adjective, secret, unknown)
5
skulking(adjective, secret, private, sneak)
4
mystical(adjective, secret, unknown, concealed)
4
shrouded(adjective, secret, unknown, concealed)
<123>
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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>