97 entries under foolish topic. ×

7
touched(adjective, simple, silly, mad)
5
fruity(adjective, silly, mad, insane)
4
potty(adjective, silly, mad, insane)
4
irrational(adjective, silly, stupid, disturbed)
4
moonstruck(adjective, silly, stupid, mad)
4
schizophrenic(adjective, silly, stupid, hacked)
3
kooky(adjective, silly, crazy, mad)
3
maniacal(adjective, silly, stupid, crazy)
3
odd(unusual, silly, unwise, weird)
3
psychopathic(adjective, informal, silly, stupid)
3
raving(adjective, silly, stupid, irrational)
3
senseless(silly, stupid, unwise)
3
strange(unusual, silly, unwise, weird)
3
unsettled(silly, stupid)
3
wacky(adjective, simple, silly, mad)
2
bats in the belfry(expression, idiom, silly, mad)
2
berserk(adjective, silly, crazy, mad)
2
delirious(adjective, silly, crazy, mad)
2
dippy(adjective, silly, mad, insane)
2
eccentric(adjective, unusual, silly, unwise)
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APASmart Define. (2015). mental thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/mental/thesaurus/synonyms
ChicagoSmart Define. 2015. "mental thesaurus" https://smartdefine.org/mental/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, mental thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/mental/thesaurus/synonyms>.
MLASmart Define. "mental thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/mental/thesaurus/synonyms>