65 entries under obscure topic. ×

1
mythical(dark, superior, mysterious, supernatural)
1
mythological(dark, superior, mysterious, supernatural)
1
paranormal(dark, mysterious, supernatural, heavenly)
1
phantom(dark, superior, mysterious, supernatural)
1
phenomenal(dark, superior, mysterious, supernatural)
1
preternatural(dark, mysterious, supernatural, heavenly)
1
psychic(dark, mysterious, supernatural, heavenly)
1
rare(dark, superior, mysterious, supernatural)
1
spectral(dark, superior, mysterious, supernatural)
1
sphinxlike(adjective, dark, strange, odd)
1
superhuman(dark, superior, mysterious, supernatural)
1
superior(dark, mysterious, supernatural, heavenly)
1
supermundane(dark, superior, mysterious, supernatural)
1
superordinary(dark, superior, mysterious, supernatural)
1
superphysical(adjective, dark, supernatural)
1
supersensible(adjective, dark, superior, supernatural)
1
supranatural(dark, superior, mysterious, supernatural)
1
transcendental(dark, strange, mysterious, supernatural)
1
uncanny(dark, superior, strange, mysterious)
1
unnatural(dark, superior, strange, mysterious)
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APASmart Define. (2015). impenetrable thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/impenetrable/thesaurus/synonyms
ChicagoSmart Define. 2015. "impenetrable thesaurus" https://smartdefine.org/impenetrable/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, impenetrable thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/impenetrable/thesaurus/synonyms>.
MLASmart Define. "impenetrable thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/impenetrable/thesaurus/synonyms>