76 entries under secret topic. ×

14
uncanny(adjective, superior, unusual, strange, wonderful)
14
inexplicable(adjective, hard, obscure, dark, strange)
14
perplexing(adjective, hard, obscure, strange, complex)
13
weird(adjective, obscure, unusual, strange, wonderful)
12
impenetrable(adjective, obscure, solid, strange)
11
hidden(adjective, hard, evil, obscure, solid)
11
cabalistic(adjective, knowledge, evil, obscure, solid)
8
concealed(adjective, evil, obscure, strange, new)
8
equivocal(adjective, dark, uncertain, doubtful, vague)
8
magical(adjective, obscure, extraordinary, superior, unusual)
7
covert(adjective, quiet, strange, hidden)
6
difficult(adjective, hard, obscure, strange, complex)
6
transcendental(adjective, strange, supernatural, heavenly)
6
oracular(adjective, dark, strange, uncertain, doubtful)
6
unidentified(adjective, strange, new, remote)
6
unknowable(adjective, solid, strange, dense)
5
furtive(adjective, obscure, strange, private)
5
insoluble(adjective, concealed)
5
latent(obscure, dark, unknown, hidden)
5
spiritual(adjective, strange, rational, intellectual)
10 years ago|26k views|share |citing 
APASmart Define. (2016). mysterious thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/mysterious/thesaurus/synonyms
ChicagoSmart Define. 2016. "mysterious thesaurus" https://smartdefine.org/mysterious/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, mysterious thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/mysterious/thesaurus/synonyms>.
MLASmart Define. "mysterious thesaurus" 24 February 2016. Web. 30 September 2026. <https://smartdefine.org/mysterious/thesaurus/synonyms>