Synonyms|330Antonyms|21|Broader|0Narrower|0Related|642

86 entries under insane topic. ×

3
screwy(adjective, slang, silly, foolish, stupid)
2
around the bend(adjective, idiom, sane)
2
barmy(silly, foolish, mad, unwise)
2
bats in the belfry(expression, idiom, silly, foolish, mad)
2
delirious(adjective, silly, foolish, mad)
2
fatuous(adjective, silly, foolish, stupid)
2
flipped out(expression, silly, foolish, mad)
2
freaked out(expression, silly, foolish, mad)
2
impractical(adjective, silly, foolish, stupid)
2
irresponsible(adjective, silly, foolish, stupid)
2
mad as a March hare(expression, idiom, silly, foolish, mad)
2
mentally strange(expression, silly, foolish, mad)
2
nutty as fruitcake(expression, idiom, silly, foolish, mad)
2
off one's rocker(adjective, idiom, sane)
2
out of one's mind(adjective, idiom, sane)
2
out to lunch(expression, idiom, silly, mad)
2
preposterous(adjective, silly, foolish, stupid)
2
psychopathic(adjective, silly, foolish, stupid)
2
rabid(adjective, silly, foolish, stupid)
2
raging(adjective, silly, foolish, stupid)
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ChicagoSmart Define. 2015. "moonstruck thesaurus" https://smartdefine.org/moonstruck/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, moonstruck thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/moonstruck/thesaurus/synonyms>.
MLASmart Define. "moonstruck thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/moonstruck/thesaurus/synonyms>