80 entries under insane topic. ×

5
moonstruck(adjective, silly, foolish, stupid, mad)
5
screwball(noun, adjective, slang, silly, mad)
5
stupid(adjective, wild, silly, foolish, crazy)
4
erratic(adjective, wild, silly, foolish, crazy)
4
moronic(adjective, stupid, crazy)
4
schizo(noun, adjective, slang, silly, mad)
4
unstable(mad, psychiatric)
3
berserk(adjective, wild, silly, foolish, crazy)
3
brainsick(adjective, sane)
3
flaky(adjective, simple, silly, foolish, crazy)
3
irrational(adjective, wrong, rough, wild, silly)
3
maniac(adjective, crazy, mad, irrational)
3
preposterous(adjective, wild, silly, foolish, stupid)
3
rabid(adjective, wrong, concern, rough, wild)
2
ape(silly, foolish, crazy, mad)
2
delirious(adjective, wild, silly, foolish, crazy)
2
flipped(silly, foolish, crazy, mad)
2
flipped out(expression, silly, foolish, crazy, mad)
2
freaked out(expression, silly, foolish, mad)
2
frenzied(adjective, wild, silly, foolish, stupid)
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APASmart Define. (2016). nuts thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/nuts/thesaurus/synonyms
ChicagoSmart Define. 2016. "nuts thesaurus" https://smartdefine.org/nuts/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, nuts thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/nuts/thesaurus/synonyms>.
MLASmart Define. "nuts thesaurus" 3 March 2016. Web. 24 September 2026. <https://smartdefine.org/nuts/thesaurus/synonyms>