2
inextricable
2
infernal(adjective, evil, threatening, nefarious, spooky)
2
invisible(obscure, dark, deep, unknown, heavenly)
2
knotty(adjective, hard, evil, delicate, loose)
2
legendary(superior, outstanding, amazing, best, chosen)
2
loose(hard, delicate, complex, tricky, complicated)
2
lost(unknown, alien)
2
magnetic(adjective, extraordinary, unusual, wonderful, marvelous)
2
marvelous(adjective, extraordinary, superior, unusual, wonderful)
2
mental(adjective, mind, rational, supernatural, spiritual)
2
moot(adjective, uncertain)
2
mythical(adjective, extraordinary, unusual, wonderful, marvelous)
2
nameless(adjective, strange, new, remote, secret)
2
necromantic(adjective, extraordinary, unusual, strange, wonderful)
2
numinous(supernatural, heavenly, spiritual, paranormal, metaphysical)
2
paranormal(adjective, supernatural, magic, heavenly, hidden)
2
parapsychological(adjective, extraordinary, unusual, wonderful, marvelous)
2
phenomenal(superior, outstanding, amazing, best, chosen)
2
powerful(superior, outstanding, amazing, best, chosen)
2
problematical(hard, delicate, uncertain, complex, doubtful)
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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>