95 entries under insane topic. ×

6
ludicrous(adjective, light, weak, simple, wild)
6
potty(adjective, wild, silly, foolish, stupid)
6
screwball(noun, silly, foolish, crazy, mad)
5
crackpot(noun, adjective, crazy, mad, odd)
5
distraught(adjective, crazy, mad, odd)
5
flaky(adjective, light, wrong, unusual, wild)
5
harebrained(adjective, weak, simple, knowledge, ability)
5
of unsound mind(expression, adjective, idiom, silly, mad)
5
off-the-wall(adjective, crazy, mad, odd)
5
psycho(noun, silly, foolish, crazy, mad)
5
twisted(adjective, crazy, mad, odd)
5
unreasonable(adjective, weak, simple, wrong, silly)
4
delirious(adjective, crazy, mad, odd)
4
maniacal(adjective, silly, foolish, crazy, mad)
4
unhinged(adjective, simple, silly, foolish, mad)
4
unsound(adjective, wrong, silly, foolish, stupid)
3
illogical(adjective, wrong, silly, foolish, sense)
3
mental(adjective, simple, silly, foolish, mad)
3
moonstruck(adjective, silly, foolish, mad)
3
out to lunch(expression, adjective, idiom, silly, crazy)
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APASmart Define. (2016). wacky thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/wacky/thesaurus/synonyms
ChicagoSmart Define. 2016. "wacky thesaurus" https://smartdefine.org/wacky/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, wacky thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/wacky/thesaurus/synonyms>.
MLASmart Define. "wacky thesaurus" 31 March 2016. Web. 28 September 2026. <https://smartdefine.org/wacky/thesaurus/synonyms>