16
abstract(adjective, rational, intellectual, theoretical, immaterial)
14
theoretical(adjective, abstract, immaterial, topical)
13
notional(adjective, real, abstract, imaginary)
12
ideal(adjective, theoretical)
9
hypothetical(adjective, theoretical, topical)
8
imaginary(adjective, real, abstract, imaginary, immaterial)
6
fanciful(adjective, real)
6
intellectual(adjective, rational, cerebral, psychological, nonconcrete)
6
spiritual(adjective, rational, immaterial, cerebral, psychological)
6
unreal(adjective, rational, real, intellectual, imaginary)
5
ideational
4
ideological(rational, cerebral, philosophical, psychological)
4
immaterial(adjective, rational, intellectual, immaterial, cerebral)
4
intangible(adjective, immaterial)
4
metaphysical
4
speculative(adjective, imaginary)
4
transcendent
4
unpractical(adjective, theoretical)
3
conceptional
3
cerebral(adjective, rational, psychological)
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APASmart Define. (2015). conceptual thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/conceptual/thesaurus/synonyms
ChicagoSmart Define. 2015. "conceptual thesaurus" https://smartdefine.org/conceptual/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, conceptual thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/conceptual/thesaurus/synonyms>.
MLASmart Define. "conceptual thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/conceptual/thesaurus/synonyms>