3
wacky(adjective, slang, sane)
2
balmy
2
barmy
2
certifiable
2
crazed(adjective, unwell)
2
daffy(adjective, informal, sane)
2
eccentric(off, dotty)
2
gaga(adjective, informal, sane)
2
neurotic
2
not all there(expression, adjective, idiom, crazy, sick)
2
off one's rocker(adjective, idiom, sane, unwell)
2
psycho(adjective, unwell)
2
pyschological
2
stark raving mad(expression, adjective, idiom, crazy, sick)
2
unhinged(adjective, cuckoo, neurotic)
1
addled
1
around the bend(adjective, idiom, sane)
1
bughouse
1
catatonic
1
crackpot
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APASmart Define. (2015). mentally ill thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/mentally_ill/thesaurus/synonyms
ChicagoSmart Define. 2015. "mentally ill thesaurus" https://smartdefine.org/mentally_ill/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, mentally ill thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/mentally_ill/thesaurus/synonyms>.
MLASmart Define. "mentally ill thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/mentally_ill/thesaurus/synonyms>