67 entries under insane topic. ×

3
out to lunch(expression, adjective, idiom, silly, crazy)
3
schizoid
3
touched(adjective, unusual, wild, strange, silly)
3
unhinged(adjective, strange, silly, foolish, mad)
2
bats in the belfry(expression, idiom, silly, foolish, mad)
2
crack-brained
2
flipped(silly, foolish, mad, unwise)
2
flipped out(expression, silly, foolish, crazy, mad)
2
frenzied
2
hysterical
2
idiotic(weak, simple, silly, foolish, crazy)
2
mad as a March hare(expression, idiom, silly, foolish, mad)
2
mad as a hatter(expression, idiom, silly, foolish, mad)
2
mentally strange(expression, silly, foolish, mad)
2
nutty as fruitcake(expression, idiom, silly, foolish, mad)
2
schizo(adjective, silly, foolish, mad)
2
screw loose(expression, silly, foolish, mad)
1
ape(silly, foolish, crazy, mad)
1
babbling
1
blithering
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APASmart Define. (2016). kooky thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/kooky/thesaurus/synonyms
ChicagoSmart Define. 2016. "kooky thesaurus" https://smartdefine.org/kooky/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, kooky thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/kooky/thesaurus/synonyms>.
MLASmart Define. "kooky thesaurus" 31 March 2016. Web. 28 September 2026. <https://smartdefine.org/kooky/thesaurus/synonyms>