80 entries under unknown topic. ×

4
obscured(adjective, secret, hidden, concealed)
4
shadowy(adjective, obscure, happy, perfect, dark)
4
veiled(adjective, obscure, strange, deep, secret)
3
classified(obscure, clandestine, underground, undisclosed)
3
private(adjective, obscure, secret, reticent)
3
secluded(adjective, obscure, dark, secret)
3
undercover(adjective, quiet, secret, private, reticent)
3
underground(adjective, obscure, secret, hidden)
2
clandestine(adjective, quiet, secret, hidden)
2
close(obscure, solid, dark, reticent)
2
clouded(adjective, obscure, dark, secret, private)
2
covered(obscure, secret, hidden, concealed)
2
eclipsed(obscure, dark, secret, hidden)
2
exotic(adjective, obscure, happy, tender, perfect)
2
hermetic(obscure, solid, dark, deep)
2
invisible(obscure, dark, deep, heavenly)
2
lost
2
reticent(obscure, private, clandestine, underground)
2
sequestered(obscure, dark, secret, hidden)
2
shrouded(adjective, obscure, secret, hidden)
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APASmart Define. (2016). mysterious thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/mysterious/thesaurus/synonyms
ChicagoSmart Define. 2016. "mysterious thesaurus" https://smartdefine.org/mysterious/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, mysterious thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/mysterious/thesaurus/synonyms>.
MLASmart Define. "mysterious thesaurus" 24 February 2016. Web. 27 September 2026. <https://smartdefine.org/mysterious/thesaurus/synonyms>