13
mad(adjective, law, crazy, unstable, insane)
12
demented(adjective, law, unstable, disturbed, unsound)
12
insane(adjective, law, mad, unstable, disturbed)
12
of unsound mind(expression, adjective, idiom, law, foolish)
11
crazy(noun, adjective, law, foolish, stupid)
11
daft(adjective, law, unstable, disturbed, sane)
11
lunatic(noun, adjective, law, foolish, crazy)
11
unbalanced(adjective, law, mad, unstable, insane)
10
deranged(adjective, mad, unstable, insane, disturbed)
10
loco(adjective, law, slang, mad, insane)
10
touched(adjective, law, unstable, disturbed, sane)
9
batty(adjective, law, slang, unstable, disturbed)
9
mental(adjective, insane, psychiatric)
9
nuts(adjective, law, slang, mad, insane)
9
psychotic(adjective, crazy, mad, unstable, insane)
9
unhinged(adjective, unstable, disturbed)
8
bonkers(adjective, law, informal, sane)
8
cracked(adjective, law, informal, sane)
8
loony(noun, adjective, law, informal, foolish)
7
dotty(adjective, law, sane)
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APASmart Define. (2015). non compos mentis thesaurus. Retrieved September 22, 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 22, 2026).
HarvardSmart Define 2015, non compos mentis thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/non_compos_mentis/thesaurus/synonyms>.
MLASmart Define. "non compos mentis thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/non_compos_mentis/thesaurus/synonyms>