69 entries under unseen topic. ×

12
abstruse(adjective, hard, evil, obscure, difficult)
12
buried(verb, adjective, show, obscure, secret)
12
undisclosed(adjective, cover, obscure, dark, secret)
11
recondite(adjective, evil, obscure, difficult, strange)
10
masked(verb, adjective, obscure, secret, unknown)
10
mystical(adjective, hard, evil, obscure, strange)
9
disguised(verb, adjective, obscure, secret, unknown)
9
out of sight(expression, adjective, idiom, adverb, view)
9
ulterior(adjective, cover, show, separate, obscure)
9
underground(adjective, secret, unknown, concealed, covert)
8
screened(verb, adjective, close, quiet, show)
8
shrouded(adjective, obscure, dark, secret, clandestine)
8
undercover(adjective, secret, spy, clandestine, underground)
7
indiscernible(adjective, secret, invisible)
6
close(adjective, quiet, solid, humble, shy)
6
clouded(adjective, secret, unknown, concealed)
5
imperceptible(adjective, imaginary, inconspicuous, unremarkable)
4
cloaked(verb, adjective, obscure, secret, unknown)
4
hermetic(adjective, close, quiet, obscure, mysterious)
4
sequestered(adjective, close, quiet, separate, humble)
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APASmart Define. (2015). hidden thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/hidden/thesaurus/synonyms
ChicagoSmart Define. 2015. "hidden thesaurus" https://smartdefine.org/hidden/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, hidden thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/hidden/thesaurus/synonyms>.
MLASmart Define. "hidden thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/hidden/thesaurus/synonyms>