Synonyms|1.4kAntonyms|650|Broader|15Narrower|0Related|2.9k
19
minor
13
flimsy(adjective, strong, light, sound, thin)
10
paltry(adjective, poor, worthless)
9
insubstantial(adjective, strong, weak, imaginary)
8
insignificant(adjective, important, significant)
7
less important
5
bantam
5
negligible
5
small
5
shy
4
piddling
4
tiny
4
intangible
4
measly
4
mini
4
spiritual
4
unrelatable
3
unimportant(adjective, weak, soft, slight, important)
3
ethereal
3
immaterial(adjective, form, important, useful, irrelevant)
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APASmart Define. (2016). substantial thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/substantial/thesaurus/antonyms
ChicagoSmart Define. 2016. "substantial thesaurus" https://smartdefine.org/substantial/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2016, substantial thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/substantial/thesaurus/antonyms>.
MLASmart Define. "substantial thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/substantial/thesaurus/antonyms>