65 entries under stupid topic. ×

4
half-baked(adjective, weak, simple, foolish)
4
heedless(adjective, careless, wild, silly)
4
nutty(adjective, weak, simple, wild, silly)
4
ridiculous(adjective, weak, simple, wild, strange)
4
wacky(adjective, weak, simple, knowledge, slang)
3
brainless(adjective, weak, simple, careless, silly)
3
careless(adjective, wrong, wild, foolish)
3
daffy(adjective, weak, simple, silly, foolish)
3
daft(adjective, weak, simple, wild, silly)
3
fatuous(weak, simple, silly, foolish)
3
imprudent(adjective, weak, simple, careless, wild)
3
incautious(adjective, weak, simple, careless, wild)
3
irresponsible(adjective, careless, wild, strange, excited)
3
nonsensical(adjective, weak, simple, knowledge, ability)
2
asinine(adjective, weak, simple, careless, foolish)
2
cockamamie(adjective, weak, great, simple, extraordinary)
2
dotty(adjective, weak, simple, silly, foolish)
2
irrational(adjective, weak, simple, careless, wild)
2
kooky(adjective, weak, great, simple, extraordinary)
2
lunatic(adjective, weak, simple, knowledge, ability)
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APASmart Define. (2015). harebrained thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/harebrained/thesaurus/synonyms
ChicagoSmart Define. 2015. "harebrained thesaurus" https://smartdefine.org/harebrained/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, harebrained thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/harebrained/thesaurus/synonyms>.
MLASmart Define. "harebrained thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/harebrained/thesaurus/synonyms>