94 entries under simple topic. ×

22
stupid(adjective, dull, weak, mind)
17
foolish(adjective, dull, weak, slight)
16
dull(adjective, slow, silly, foolish)
16
fatuous(adjective, weak, ability, silly)
16
silly(adjective, weak, slight, ability)
16
slow(adjective, dull, mind, think)
15
brainless(adjective, dull, weak, ability)
15
doltish(adjective, dull, weak, slow)
15
mindless(adjective, dull, ability, silly)
14
senseless(adjective, dull, weak, ability)
13
thick(adjective, dull, slow, silly)
13
witless(adjective, dull, weak, ability)
11
obtuse(adjective, dull, slow, silly)
11
idiotic(adjective, dull, weak, mind)
11
moronic(adjective, dull, weak, mind)
10
dumb(adjective, dull, slow, silly)
10
empty-headed(adjective, slight, indifferent, foolish)
9
dense(adjective, dull, slow, silly)
8
imbecilic(adjective, dull, weak, slow)
8
inane(adjective, dull, slight, silly)
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APASmart Define. (2016). unintelligent thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unintelligent/thesaurus/synonyms
ChicagoSmart Define. 2016. "unintelligent thesaurus" https://smartdefine.org/unintelligent/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, unintelligent thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unintelligent/thesaurus/synonyms>.
MLASmart Define. "unintelligent thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/unintelligent/thesaurus/synonyms>