60 entries under undisclosed topic. ×

1
mysterious(obscure, unknown, clandestine, underground)
1
recondite(obscure, unknown, clandestine, underground)
1
unenlightened(obscure, deep, unknown, clandestine, underground)
1
unknown(obscure, clandestine, underground, unrevealed)
1
unpublished(obscure, deep, unknown, clandestine, underground)
1
unseen(obscure, unknown, clandestine, underground)
0
ambiguous(obscure, deep, unknown, clandestine, underground)
0
backstairs(clandestine, underground)
0
camouflaged(obscure, unknown, clandestine, underground)
0
classified(obscure, unknown, personal, clandestine, underground)
0
cloak-and-dagger(obscure, unknown, clandestine, underground)
0
clouded(obscure, unknown, clandestine, underground)
0
conspiratorial(obscure, unknown, clandestine, underground)
0
discreet(personal, clandestine, underground, confidential)
0
dissembled(clandestine, underground)
0
dissimulated(clandestine, underground)
0
in ambush(expression, clandestine, underground)
0
inside(personal, clandestine, underground, confidential)
0
mystic(obscure, unknown, clandestine, underground)
0
mystical(obscure, unknown, clandestine, underground)
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APASmart Define. (2015). retired thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/retired/thesaurus/synonyms
ChicagoSmart Define. 2015. "retired thesaurus" https://smartdefine.org/retired/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, retired thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/retired/thesaurus/synonyms>.
MLASmart Define. "retired thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/retired/thesaurus/synonyms>