Synonyms|860Antonyms|162|Broader|10Narrower|5Related|1.4k

384 entries under adjective topic. ×

7
fantastic(strange, fantasy, imaginary, unreal)
7
hallucinatory(strange, negative, fantasy, unreal)
7
metaphysical(body, light, weak, slight)
7
negligible(slight, small, limited, unimportant)
7
shaky(weak, slight, thin, delicate)
7
small(light, weak, slight, easy)
7
spiritual(body, abstract, shadowy, theoretical)
7
superficial(weak, slight, flat, poor)
6
chimerical(light, weak, negative, imaginary)
6
filmy(light, slight, easy, thin)
6
gauzy(light, weak, thin, feeble)
6
illusive(strange, fantasy, unreal)
6
inadequate(dull, light, weak, soft)
6
meaningless(slight, use, value, trivial)
6
nonmaterial(abstract, theoretical, abstruse, philosophical)
6
nonphysical(body, abstract, theoretical, immaterial)
6
ramshackle(feeble, frail, unsound, flimsy)
6
slender(mean, light, weak, slight)
6
unimportant(value, small, insignificant, trivial)
6
vague(value, negative, insignificant, unimportant)
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ChicagoSmart Define. 2016. "insubstantial thesaurus" https://smartdefine.org/insubstantial/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, insubstantial thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/insubstantial/thesaurus/synonyms>.
MLASmart Define. "insubstantial thesaurus" 30 March 2016. Web. 27 September 2026. <https://smartdefine.org/insubstantial/thesaurus/synonyms>