Synonyms|1.4kAntonyms|650|Broader|15Narrower|0Related|2.9k
3
in mind
3
little
3
inconsiderable
3
incorporeal
3
abstract
3
airy
3
lightweight
3
meager(adjective, poor, small, inadequate, plentiful)
3
metaphysical(adjective, physical, obvious, presence)
3
minuscule
3
minute(adjective, unimportant)
3
nominal
3
trivial(adjective, serious)
3
worthless
2
diminutive
2
dinky
2
fictitious
2
filmy(adjective, fragile, finespun)
2
fine
2
futile
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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>