384 entries under adjective topic. ×

12
ethereal(light, slight, easy, thin)
12
imaginary(strange, negative, fantasy, imaginary)
11
decrepit(strong, light, weak, slight)
11
delicate(strong, light, weak, slight)
10
ephemeral(light, weak, slight, short)
10
gossamer(light, thin, feeble, flimsy)
10
light(weak, soft, slight, thin)
10
unsound(strong, light, weak, slight)
10
visionary(fake, false, strange, fantasy)
9
paltry(weak, slight, thin, delicate)
9
puny(strong, light, weak, slight)
9
trifling(light, slight, easy, thin)
8
impalpable(fake, false, abstract, fanciful)
8
inconsequential(light, slight, easy, thin)
8
infirm(strong, light, weak, slight)
8
rickety(weak, slight, weakness, thin)
8
shadowy(unsubstantiality, inexistence)
7
bodiless(body, abstract, theoretical, abstruse)
7
false(light, weak, slight, fake)
7
fancied(strange, negative, fantasy, unreal)
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APASmart Define. (2016). insubstantial thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/insubstantial/thesaurus/synonyms
ChicagoSmart Define. 2016. "insubstantial thesaurus" https://smartdefine.org/insubstantial/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, insubstantial thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/insubstantial/thesaurus/synonyms>.
MLASmart Define. "insubstantial thesaurus" 30 March 2016. Web. 26 September 2026. <https://smartdefine.org/insubstantial/thesaurus/synonyms>