6
unstable(false, foolish, unreasonable, ill, shaky)
5
balmy(adjective, wild, silly, foolish, stupid)
5
buggy(adjective, slang, silly, foolish, crazy)
5
bughouse
5
crack-brained(adjective, insane)
5
crackbrained
5
crackers
5
fruity(adjective, slang, silly, foolish, mad)
5
neurotic(adjective, insane, preoccupied, cuckoo, fixated)
5
off(adjective, sane)
5
raving(adjective, upset, wrong, silly, foolish)
5
silly(adjective, wrong, wild, foolish, stupid)
5
very upset(expression, upset, mad, insane)
5
witless
4
bats
4
dippy(adjective, silly, foolish, crazy, mad)
4
erratic(adjective, unusual, wild, strange, silly)
4
frenetic(adjective, upset, violent, mad, vicious)
4
ill(adjective, unstable, shaky, insane, unhealthy)
4
meshuga
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APASmart Define. (2015). demented thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/demented/thesaurus/synonyms
ChicagoSmart Define. 2015. "demented thesaurus" https://smartdefine.org/demented/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, demented thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/demented/thesaurus/synonyms>.
MLASmart Define. "demented thesaurus" 17 July 2015. Web. 23 September 2026. <https://smartdefine.org/demented/thesaurus/synonyms>