103 entries under hidden topic. ×

7
incomprehensible(adjective, obscure, dark, strange, uncertain)
7
strange(adjective, property, new, remote, odd)
7
under wraps(expression, adjective, idiom, adverb, show)
7
unseen(adjective, unknown, covered, dormant)
6
buried(adjective, separate, unknown, concealed)
6
guarded(adjective, intimate, private, personal)
6
invisible(adjective, obscure, dark, superior, unknown)
6
out-of-the-way(adjective, close, quiet, obscure, remote)
6
screened(adjective, close, quiet, show, obscure)
6
shrouded(adjective, separate, obscure, clandestine)
6
unpublished(adjective, clandestine, underground, undisclosed)
5
covered(adjective, obscure, unknown, concealed)
5
inscrutable(adjective, dark, strange, uncertain, blank)
5
obscured(adjective, separate, concealed, underhanded)
5
retired(verb, adjective, close, quiet, obscure)
5
ulterior(adjective, separate, unknown, concealed)
4
closet(adjective, close, quiet, intimate, private)
4
clouded(adjective, unknown, underground, concealed)
4
conspiratorial(adjective, clandestine, underground, undisclosed)
4
incognito(adjective, unknown, clandestine, undisclosed)
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APASmart Define. (2016). secret thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/secret/thesaurus/synonyms
ChicagoSmart Define. 2016. "secret thesaurus" https://smartdefine.org/secret/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, secret thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/secret/thesaurus/synonyms>.
MLASmart Define. "secret thesaurus" 31 March 2016. Web. 26 September 2026. <https://smartdefine.org/secret/thesaurus/synonyms>