7
maniacal(adjective, law, sane)
7
not all there(expression, adjective, idiom, law, unstable)
7
nutty(adjective, law, slang, unstable, disturbed)
6
bananas(adjective, law, slang, foolish, crazy)
6
barmy
6
crazed
6
cuckoo(adjective, law, slang, sane)
6
screwy(adjective, law, slang, sane)
5
certifiable
5
distraught(adjective, law, crazy, sane, hysterical)
5
fruity(adjective, law, slang, mad, insane)
5
mentally ill(expression, adjective, law, mad, insane)
5
out to lunch(expression, adjective, idiom, unstable, disturbed)
5
unsound(adjective, law, foolish, crazy, unstable)
4
brainsick(adjective, law, sane)
4
crackbrained(crazy, hysterical, psychotic)
4
crackers(adjective, sane)
4
daffy(adjective, law, informal, sane)
4
irrational(adjective, unstable, disturbed, unhinged)
4
maniac(noun, adjective, law, crazy, mad)
11 years ago|3.7k views|share |citing 
APASmart Define. (2015). non compos mentis thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/non_compos_mentis/thesaurus/synonyms
ChicagoSmart Define. 2015. "non compos mentis thesaurus" https://smartdefine.org/non_compos_mentis/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, non compos mentis thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/non_compos_mentis/thesaurus/synonyms>.
MLASmart Define. "non compos mentis thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/non_compos_mentis/thesaurus/synonyms>