Synonyms|1.4kAntonyms|650|Broader|15Narrower|0Related|2.9k
2
inconsequential
2
infinitesimal(adjective, small)
2
marginal
2
meaningless(adjective, reasonable, meaningful)
2
microscopic
2
null
2
pointless
2
puny
2
slight
2
slim
2
teeny
2
tenuous(adjective, weak, thin)
2
trifling
2
undersized
2
unreal
2
unsubstantial
2
wee
1
abortive
1
absurd
1
aerial
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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>