46 entries under theoretical topic. ×

4
transcendental(abstract, abstruse, philosophical, generality)
3
ideal(abstract, abstruse, philosophical)
2
eternal(abstract, abstruse, philosophical)
2
metaphysical(adjective, physical, abstract, presence)
1
abstract(abstruse, philosophical)
1
abstruse(abstract, philosophical)
1
bodiless(abstract, abstruse, philosophical)
1
deep(spread, large, thick, abstract, ample)
1
difficult(abstract, abstruse, philosophical)
1
discarnate(abstract, abstruse, philosophical)
1
esoteric(abstract, abstruse, philosophical)
1
fundamental(noun, order, usual, main, abstract)
1
high-flown(abstract, abstruse, philosophical)
1
immaterial(abstract, abstruse, philosophical)
1
impalpable(abstract, abstruse, philosophical)
1
incorporeal(abstract, abstruse, philosophical)
1
insubstantial(abstract, abstruse, philosophical)
1
intangible(abstract, abstruse, philosophical)
1
intellectual(abstract, abstruse, philosophical)
1
jesuitic(abstract, abstruse, philosophical)
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APASmart Define. (2016). universal thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/universal/thesaurus/synonyms
ChicagoSmart Define. 2016. "universal thesaurus" https://smartdefine.org/universal/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, universal thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/universal/thesaurus/synonyms>.
MLASmart Define. "universal thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/universal/thesaurus/synonyms>