Synonyms|605Antonyms|74|Broader|8Narrower|0Related|641

135 entries under insane topic. ×

3
bizarre(adjective, wrong, unusual, wild, strange)
3
flaky(adjective, silly, foolish, crazy, mad)
3
nutty as fruitcake(expression, idiom, silly, foolish, mad)
3
schizo(adjective, silly, foolish, mad)
3
screwball(adjective, silly, foolish, crazy, mad)
2
around the bend(expression, adjective, idiom, wrong, confused)
2
bats in the belfry(expression, idiom, silly, foolish, mad)
2
brain-sick
2
crazy as a loon(expression, adjective, idiom, crazy, confused)
2
distressed(upset, mad)
2
fatuous(adjective, wrong, wild, silly, foolish)
2
flipped out(expression, silly, crazy, mad)
2
freaked out(expression, silly, foolish, crazy, mad)
2
incongruous(false, unstable, ill, shaky)
2
mad as a March hare(expression, idiom, silly, foolish, mad)
2
mad as a hatter(expression, adjective, idiom, silly, foolish)
2
mentally strange(expression, silly, foolish, mad)
2
round the bend(expression, idiom, silly, foolish, mad)
2
screw loose(expression, silly, foolish, mad)
2
upset(mad, angry, preoccupied, livid)
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APASmart Define. (2015). demented thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/demented/thesaurus/synonyms
ChicagoSmart Define. 2015. "demented thesaurus" https://smartdefine.org/demented/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, demented thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/demented/thesaurus/synonyms>.
MLASmart Define. "demented thesaurus" 17 July 2015. Web. 28 September 2026. <https://smartdefine.org/demented/thesaurus/synonyms>