63 entries under abstract topic. ×

1
bodiless(theoretical, abstruse, philosophical)
1
conjectural(adjective, theoretical, academic, philosophical)
1
difficult(deep, thoughtful, theoretical, reflective)
1
esoteric(adjective, sound, deep, thoughtful)
1
eternal(excellent, obscure, extraordinary, superior)
1
fundamental(theoretical, abstruse, philosophical)
1
high-flown(adjective, supernatural, spiritual, unreal)
1
hypothetical(adjective, obscure, extraordinary, fantastic, whole)
1
imaginary(adjective, rational, emotional, reasoning, thinking)
1
impalpable(theoretical, abstruse, philosophical)
1
insubstantial(theoretical, abstruse, philosophical)
1
intangible(theoretical, abstruse, philosophical, nonconcrete)
1
ivory-tower(adjective, unreal, unattainable)
1
jesuitic(theoretical, abstruse, philosophical)
1
mystical(theoretical, abstruse, philosophical)
1
nonmaterial(theoretical, abstruse, philosophical)
1
nonphysical(theoretical, abstruse, philosophical)
1
numinous(theoretical, abstruse, philosophical)
1
oversubtle(theoretical, abstruse, philosophical)
1
quixotic(adjective, vague, logical, unreal)
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APASmart Define. (2016). intellectual thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/intellectual/thesaurus/synonyms
ChicagoSmart Define. 2016. "intellectual thesaurus" https://smartdefine.org/intellectual/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, intellectual thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/intellectual/thesaurus/synonyms>.
MLASmart Define. "intellectual thesaurus" 22 February 2016. Web. 25 September 2026. <https://smartdefine.org/intellectual/thesaurus/synonyms>