30 entries under adjective topic. ×

17
unrevealed(obscure, dark, secret, unknown)
14
hidden(cover, obscure, dark, secret)
14
secret(unknown, hidden, personal, concealed)
10
concealed(obscure, dark, secret, imperceptible)
10
private(obscure, secret, unknown, hidden)
8
covert(obscure, dark, hidden, imperceptible)
6
mysterious(obscure, dark, secret, unknown)
6
unexpressed(cover, obscure, dark, equivocal)
5
confidential(personal, clandestine, underground, hush-hush)
5
ulterior(cover, obscure, secret, imperceptible)
4
invisible(obscure, dark, unknown, hidden)
4
obscure(cover, dark, unknown, hidden)
4
personal(cover, obscure, dark, equivocal)
3
hush-hush(personal, clandestine, underground, confidential)
3
clandestine(secret, unknown, hidden, personal)
3
sealed
3
surreptitious(secret, unknown, hidden, concealed)
2
anonymous(choice, unknown)
2
unannounced
2
underhand(clandestine, underground)
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APASmart Define. (2015). undisclosed thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/undisclosed/thesaurus/synonyms
ChicagoSmart Define. 2015. "undisclosed thesaurus" https://smartdefine.org/undisclosed/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, undisclosed thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/undisclosed/thesaurus/synonyms>.
MLASmart Define. "undisclosed thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/undisclosed/thesaurus/synonyms>