Synonyms|822Antonyms|482|Broader|8Narrower|4Related|2.3k
2
implausible
2
incoherent
2
inconsequent
2
inconsequential
2
incorrect(adjective, sound, right)
2
inexact
2
invalidated
2
irrational
2
mad
2
misleading
2
nonrational
2
nonsensical
2
nonvalid
2
nullified
2
sham
2
simpleminded
2
sophistic
2
sophistical
2
spurious(adjective, true)
2
uncollectible
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ChicagoSmart Define. 2016. "valid thesaurus" https://smartdefine.org/valid/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 2016, valid thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/valid/thesaurus/antonyms>.
MLASmart Define. "valid thesaurus" 31 March 2016. Web. 21 September 2026. <https://smartdefine.org/valid/thesaurus/antonyms>