94 entries under simple topic. ×

7
ignorant(adjective, slight, slow, silly)
7
unwise(adjective, weak, silly, foolish)
6
dim(adjective, dull, slow, foolish)
6
shallow(adjective, slight, slow, silly)
6
stolid(adjective, dull, slow, foolish)
6
unintellectual(adjective, slow, stupid, boring)
6
unthinking(adjective, dull, slight, silly)
5
insensate(adjective, dull, ability, slow)
5
asinine(adjective, weak, silly, foolish)
5
daft(adjective, weak, slow, silly)
5
dim-witted(adjective, dull, slow, foolish)
5
irrational(adjective, weak, silly, foolish)
4
feeble-minded(adjective, dull, slow, foolish)
4
feebleminded(adjective, weak, silly, foolish)
4
half-witted(adjective, dull, weak, slow)
4
imbecile(adjective, dull, silly, foolish)
4
nonsensical(adjective, dull, weak, silly)
4
pointless(adjective, dull, slow, silly)
4
ridiculous(adjective, weak, mind, think)
4
vacuous(adjective, slow, indifferent, silly)
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APASmart Define. (2016). unintelligent thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/unintelligent/thesaurus/synonyms
ChicagoSmart Define. 2016. "unintelligent thesaurus" https://smartdefine.org/unintelligent/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, unintelligent thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/unintelligent/thesaurus/synonyms>.
MLASmart Define. "unintelligent thesaurus" 24 March 2016. Web. 27 September 2026. <https://smartdefine.org/unintelligent/thesaurus/synonyms>