62 entries under secret topic. ×

10
opaque(adjective, hard, obscure, uncertain)
10
unfathomable(adjective, obscure, difficult, dark, strange)
9
perplexing(adjective, obscure, difficult, dark, strange)
8
concealed(adjective, cover, evil, obscure, difficult)
8
covert(adjective, obscure, dark, reticent)
8
veiled(adjective, obscure, strange, unknown)
7
close(adjective, obscure, dark, reticent)
7
inexplicable(adjective, obscure, dark, strange, uncertain)
6
murky(adjective, obscure)
6
oracular(adjective, obscure, dark, uncertain, doubtful)
6
secretive(adjective, obscure, strange, mysterious)
6
strange(adjective, obscure, unknown, clandestine)
5
tenebrous(adjective, obscure, difficult, uncertain, doubtful)
4
clandestine(adjective, unknown, hidden, concealed)
4
evasive(adjective, obscure)
4
latent(obscure, dark, unknown, hidden)
4
ulterior(adjective, cover, obscure, unknown)
3
Delphic(adjective, obscure)
3
unrevealed(adjective, obscure, dark, unknown)
2
uninformative(adjective, obscure)
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APASmart Define. (2016). cryptic thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/cryptic/thesaurus/synonyms
ChicagoSmart Define. 2016. "cryptic thesaurus" https://smartdefine.org/cryptic/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, cryptic thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/cryptic/thesaurus/synonyms>.
MLASmart Define. "cryptic thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/cryptic/thesaurus/synonyms>