Synonyms|822Antonyms|482|Broader|8Narrower|4Related|2.3k
3
fraudulent(adjective, open, false, genuine, deceptive)
3
groundless
3
loony
3
surreal(adjective, true)
3
unacceptable(adjective, false, illegal)
3
unfounded
3
unreasonable
3
unsubstantiated
3
weak
2
bad
2
bogus(adjective, genuine)
2
cockeyed
2
counterfeit(adjective, honest, false, genuine, illegal)
2
daffy
2
delusive
2
erroneous(adjective, wrong, incorrect)
2
fatuous
2
half-baked
2
half-witted
2
harebrained
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ChicagoSmart Define. 2016. "valid thesaurus" https://smartdefine.org/valid/thesaurus/antonyms (accessed September 20, 2026).
HarvardSmart Define 2016, valid thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/valid/thesaurus/antonyms>.
MLASmart Define. "valid thesaurus" 31 March 2016. Web. 20 September 2026. <https://smartdefine.org/valid/thesaurus/antonyms>