2
gauzy(weak, slight, thin, feeble, tacky)
2
gingerbread(noun, weakness)
2
gossamer(adjective, weak, slight, thin, feeble)
2
hallucinational(adjective, strange, fantasy, unreal)
2
hallucinative(adjective, strange, fantasy, unreal)
2
hazy(obscure, vague)
2
ideal(adjective, fantastic, abstract, imaginary, unreal)
2
inane(adjective, substance, shadowy)
2
incongruous(adjective, false, strange, fantasy, insane)
2
incorporate(heavenly, incorporeal, nonmaterial)
2
lame(adjective, weak, flat, poor, thin)
2
languid(adjective, uncertain, feeble, shaky, hesitant)
2
little(adjective, light, weak, slight, easy)
2
makeshift(adjective, poor, uncertain, feeble, hesitant)
2
meager(adjective, light, weak, slight, easy)
2
minor(adjective, weak, soft, gentle, mild)
2
misleading(imaginary, illusory, dreamlike)
2
nebulous(imaginary, illusory, dreamlike, ephemeral)
2
nonexistent(adjective, fantastic, real, imaginary, unreal)
2
notional(adjective, fantastic, imaginary, unreal, theoretical)
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APASmart Define. (2016). unsubstantial thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unsubstantial/thesaurus/synonyms
ChicagoSmart Define. 2016. "unsubstantial thesaurus" https://smartdefine.org/unsubstantial/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, unsubstantial thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unsubstantial/thesaurus/synonyms>.
MLASmart Define. "unsubstantial thesaurus" 30 March 2016. Web. 25 September 2026. <https://smartdefine.org/unsubstantial/thesaurus/synonyms>