1
oracular(adjective, strange, unknown, curious, concealed)
1
outweigh
1
paranormal(adjective, obscure, dark, mysterious, supernatural)
1
past comprehension
1
perplexing(adjective, strange, unfathomable, impenetrable, opaque)
1
phantom(adjective, obscure, dark, superior, supernatural)
1
phenomenal(adjective, obscure, dark, superior, mysterious)
1
phony(adjective, extraordinary, strange, unbelievable, implausible)
1
preternatural(adjective, obscure, dark, mysterious, supernatural)
1
psychic(adjective, obscure, dark, mysterious, supernatural)
1
quixotic(adjective, supernatural, imaginary, spiritual, mystical)
1
rambling
1
rare(adjective, obscure, extraordinary, strange, heavenly)
1
reachy(adjective, extraordinary, belief, strange, unbelievable)
1
recondite(adjective, strange, hidden, inexplicable, unexplained)
1
sealed
1
secretive(adjective, strange, unknown, curious, concealed)
1
sibylline(adjective, solid, dense, unfathomable, impenetrable)
1
spectral(adjective, obscure, dark, superior, supernatural)
1
sphinxlike(adjective, obscure, difficult, dark, strange)
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APASmart Define. (2015). unknowable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/unknowable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unknowable thesaurus" https://smartdefine.org/unknowable/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, unknowable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/unknowable/thesaurus/synonyms>.
MLASmart Define. "unknowable thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/unknowable/thesaurus/synonyms>