83 entries under hidden topic. ×

2
disguised(secret, unknown, clandestine, concealed)
2
out-of-the-way(close, quiet, obscure, remote, unknown)
2
shrouded(adjective, obscure, secret, unknown)
2
sly(adjective, secret, clandestine, underground)
2
sneaky(adjective, secret, clandestine, underground)
2
unauthorized(adjective, secret, sneaky, covert)
2
underhanded(secret, clandestine, underground, undisclosed)
1
QT(secret, unknown, isolated, clandestine)
1
buried(secret, unknown, concealed, underhanded)
1
camouflaged(obscure, secret, unknown, clandestine)
1
cloak-and-dagger(obscure, secret, unknown, clandestine)
1
clouded(obscure, secret, unknown, concealed)
1
covered(obscure, secret, unknown, underground)
1
dissembled(secret, clandestine, underground, undisclosed)
1
fraudulent(secret, sneaky, covert)
1
hermetic(close, quiet, secret, unknown, isolated)
1
hermetical(secret, unknown, isolated, concealed)
1
hole-and-corner(secret, spy, sneaky, covert)
1
imperceivable(secret, unknown, isolated, concealed)
1
in the dark(expression, idiom, mysterious, reticent, unknown)
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APASmart Define. (2016). private thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/private/thesaurus/synonyms
ChicagoSmart Define. 2016. "private thesaurus" https://smartdefine.org/private/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, private thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/private/thesaurus/synonyms>.
MLASmart Define. "private thesaurus" 26 February 2016. Web. 24 September 2026. <https://smartdefine.org/private/thesaurus/synonyms>