10
inner(adjective, mind, rational, emotional, hidden)
10
psycho(noun, adjective, slang, silly, mad)
9
barmy(adjective, silly, foolish, crazy, mad)
9
demented(adjective, simple, silly, foolish, mad)
9
non compos mentis(expression, adjective, idiom, insane, psychiatric)
9
nutty(adjective, simple, silly, foolish, mad)
9
rational(adjective, mind, intelligent, thoughtful, intellect)
9
screwy(adjective, silly, foolish, crazy, mad)
9
subjective(adjective, mind, rational, intelligent, thoughtful)
9
unhinged(adjective, simple, silly, foolish, mad)
8
balmy(adjective, silly, foolish, unwise)
8
certifiable
8
crazed(adjective, silly, foolish, stupid, crazy)
8
disturbed(adjective, insane, irrational, unbalanced, psychiatric)
8
of unsound mind(expression, adjective, idiom, silly, mad)
8
private(adjective, feature, characteristic, attribute, own)
7
cracked(adjective, simple, silly, foolish, mad)
7
crackers
7
cuckoo(noun, adjective, slang, silly, mad)
7
internal(adjective, bodily, inward)
11 years ago|15k views|share |citing 
APASmart Define. (2015). mental thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/mental/thesaurus/synonyms
ChicagoSmart Define. 2015. "mental thesaurus" https://smartdefine.org/mental/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, mental thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/mental/thesaurus/synonyms>.
MLASmart Define. "mental thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/mental/thesaurus/synonyms>