47 entries under theoretical topic. ×

10
immaterial(adjective, form, supernatural, abstract, heavenly)
9
insubstantial(adjective, abstract, abstruse, philosophical)
7
unsubstantial(adjective, abstract, heavenly, abstruse)
6
incorporeal(adjective, abstract, heavenly, religious)
6
nonphysical(adjective, supernatural, abstract, heavenly, airy)
6
spiritual(adjective, abstract, heavenly, religious)
5
bodiless(adjective, abstract, heavenly, abstruse)
5
discarnate(adjective, supernatural, abstract, heavenly, airy)
5
metaphysical(adjective, physical, abstract, heavenly)
4
intangible(abstract, heavenly, religious, sacred)
3
unreal(adjective, abstract, abstruse, philosophical)
2
impalpable(abstract, heavenly, abstruse, philosophical)
2
supernatural(abstract, heavenly, abstruse, philosophical)
2
unearthly(abstract, heavenly, abstruse, philosophical)
2
unfleshly(adjective, supernatural, abstract, heavenly, airy)
2
unphysical(abstract, religious, sacred, abstruse)
1
abstract(abstruse, philosophical)
1
abstruse(abstract, philosophical)
1
deep(abstract, abstruse, philosophical)
1
difficult(abstract, abstruse, philosophical)
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APASmart Define. (2015). nonmaterial thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/nonmaterial/thesaurus/synonyms
ChicagoSmart Define. 2015. "nonmaterial thesaurus" https://smartdefine.org/nonmaterial/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, nonmaterial thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/nonmaterial/thesaurus/synonyms>.
MLASmart Define. "nonmaterial thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/nonmaterial/thesaurus/synonyms>