Synonyms|1.1kAntonyms|378|Broader|19Narrower|26Related|2.4k
2
unbalanced(adjective, careless, stupid, illogical)
2
unfounded
2
unintelligent(adjective, careless, stupid, illogical)
2
unsustainable
2
unwarranted
2
unwise(adjective, careless, stupid, illogical)
2
witless
1
cockeyed
1
preposterous
1
anxious
1
arbitrary(adjective, chance, whimsical)
1
barmy
1
brain-dead
1
bubbleheaded
1
clairvoyant
1
cracked
1
crackers
1
crazed
1
daffy
1
delirious
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ChicagoSmart Define. 2016. "rational thesaurus" https://smartdefine.org/rational/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2016, rational thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/rational/thesaurus/antonyms>.
MLASmart Define. "rational thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/rational/thesaurus/antonyms>