18
mad(adjective, crazy, insane)
16
insane(adjective, sound, sensible, foolish, stupid)
15
crazy(adjective, calm, sound, strange, stupid)
12
trippy(state, behavior)
11
paranoid
8
unreasonable(adjective, stupid, insane)
7
silly
6
goofy
6
wild(adjective, reasonable, sensible)
6
unstable(adjective, stupid, insane)
5
batty(adjective, crazy)
4
lunatic(noun, adjective, person, reasonable, crazy)
3
unsound(adjective, strong, sound, stupid, well)
3
daydreamer
3
demented
3
foolish(adjective, sound, stupid, wise, insane)
3
irrational(adjective, sound, stupid, rational, insane)
3
balmy(adjective, violent, insane)
3
deranged
2
crazed
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APASmart Define. (2015). sane thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/sane/thesaurus/antonyms
ChicagoSmart Define. 2015. "sane thesaurus" https://smartdefine.org/sane/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2015, sane thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/sane/thesaurus/antonyms>.
MLASmart Define. "sane thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/sane/thesaurus/antonyms>