65 entries under stupid topic. ×

2
mindless(adjective, careless, wild, silly, foolish)
2
moronic(adjective, weak, simple, knowledge, ability)
2
potty(adjective, wild, silly, foolish)
2
puerile(silly, foolish, fantastic, trivial)
2
unreasonable(weak, simple, silly, foolish)
2
unwise(weak, simple, silly, foolish)
1
barmy(adjective, careless, silly, foolish)
1
batty(adjective, keen, warm, slow, wild)
1
bizarre(adjective, careless, silly, foolish)
1
changeable(adjective, careless, wild, excited, foolish)
1
cracked(adjective, wild, silly, foolish)
1
deranged(adjective, wild, silly, foolish)
1
ignorant(impulsive, absurd, impractical, half-baked)
1
immature(careless, silly, thoughtless, impulsive)
1
inappropriate(silly, foolish, fantastic, absurd)
1
ludicrous(weak, simple, silly, foolish)
1
nuts(adjective, wild, silly, foolish)
1
odd(adjective, wild, strange, silly, foolish)
1
touched(adjective, wild, silly, foolish)
1
unstable(adjective, careless, immoral, thoughtless)
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APASmart Define. (2015). harebrained thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/harebrained/thesaurus/synonyms
ChicagoSmart Define. 2015. "harebrained thesaurus" https://smartdefine.org/harebrained/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, harebrained thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/harebrained/thesaurus/synonyms>.
MLASmart Define. "harebrained thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/harebrained/thesaurus/synonyms>