5
hare-brained
5
ignorant(adjective, dull, simple, rough, slow)
5
irksome
5
jejune(adjective, dull, flat, slow, silly)
5
jerky(adjective, weak, simple, silly, foolish)
5
lethargic(adjective, action, dull, slow, cold)
5
nitwit(noun, fool, foolish, sap)
5
outlandish(adjective, offensive, rude, wild, silly)
5
prosaic(adjective, dull, flat, ordinary, dry)
5
rash(adjective, dull, sharp, rough, harsh)
5
scatterbrained
5
short-sighted(adjective, weak, simple, silly, foolish)
5
simple-minded(adjective, dull, simple, slow, informal)
5
stunned
5
stupe
5
stupid person(noun, expression, idiom)
5
useless(adjective, weak, informal, offensive, rude)
4
brute
4
inept(adjective, dull, simple, sharp, flat)
4
barmy(adjective, careless, silly, foolish, unwise)
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APASmart Define. (2016). stupid thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/stupid/thesaurus/synonyms
ChicagoSmart Define. 2016. "stupid thesaurus" https://smartdefine.org/stupid/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, stupid thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/stupid/thesaurus/synonyms>.
MLASmart Define. "stupid thesaurus" 2 April 2016. Web. 24 September 2026. <https://smartdefine.org/stupid/thesaurus/synonyms>