Synonyms|796Antonyms|149|Broader|10Narrower|0Related|951

56 entries under theoretical topic. ×

2
supposititious(fantastic, imaginary, unreal, fictitious)
2
unfleshly(abstract, heavenly, abstruse, philosophical)
2
unphysical(abstract, abstruse, philosophical)
1
abstruse(abstract, insubstantial, imperceptible, philosophical)
1
deep(abstract, abstruse, philosophical)
1
difficult(abstract, abstruse, philosophical)
1
esoteric(abstract, abstruse, philosophical)
1
eternal(abstract, abstruse, philosophical)
1
fabulous(fantastic, imaginary, unreal, fictitious)
1
figmental(fantastic, imaginary, unreal, fictitious)
1
fundamental(abstract, abstruse, philosophical)
1
high-flown(abstract, abstruse, philosophical)
1
hypothetical(negative, fantastic, abstract, unreal, insubstantial)
1
imagined(negative, fantastic, imaginary, unreal)
1
intellectual(abstract, abstruse, philosophical)
1
jesuitic(abstract, abstruse, philosophical)
1
legendary(negative, fantastic, imaginary, unreal)
1
mystical(abstract, abstruse, philosophical)
1
numinous(abstract, abstruse, philosophical)
1
oversubtle(abstract, abstruse, philosophical)
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APASmart Define. (2016). unsubstantial thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unsubstantial/thesaurus/synonyms
ChicagoSmart Define. 2016. "unsubstantial thesaurus" https://smartdefine.org/unsubstantial/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, unsubstantial thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unsubstantial/thesaurus/synonyms>.
MLASmart Define. "unsubstantial thesaurus" 30 March 2016. Web. 28 September 2026. <https://smartdefine.org/unsubstantial/thesaurus/synonyms>