253 entries under stupid topic. ×

5
simple-minded(adjective, silly, green, fat)
4
confused(adjective, careless, unreasonable, thoughtless)
4
dimwitted(adjective, silly, green, fat)
4
improper(adjective, wrong, offensive, rude, careless)
4
nitwitted(adjective, simple, silly, senseless)
4
potty(adjective, wild, silly, crazy)
4
reasonless(unreasonable, senseless, irrational, illogical)
4
unreasoning(careless, unreasonable, thoughtless, irrational)
4
unstable(careless, unreasonable, fantastic, unthinking)
4
unwary(adjective, careless, thoughtless, impulsive)
4
vacant(adjective, careless, indifferent, silly)
3
beaglebrained
3
brain-dead
3
capricious(careless, senseless, irrational, negligent)
3
clueless
3
cushion-witted
3
feeble(adjective, silly, green, fat)
3
flaky(adjective, wrong, wild, silly)
3
headlong(adjective, careless, thoughtless, impulsive)
3
hilarious(adjective, silly, absurd, amusing)
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APASmart Define. (2016). foolish thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/foolish/thesaurus/synonyms
ChicagoSmart Define. 2016. "foolish thesaurus" https://smartdefine.org/foolish/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, foolish thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/foolish/thesaurus/synonyms>.
MLASmart Define. "foolish thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/foolish/thesaurus/synonyms>