129 entries under foolish topic. ×

4
weak(adjective, simple, silly, stupid)
3
deficient(adjective, dull, silly, stupid)
3
dopey(adjective, dull, simple, slow)
3
ludicrous(adjective, dull, weak, simple, silly)
3
mad(adjective, weak, simple, silly)
3
meaningless(adjective, dull, simple, slight, silly)
3
thick-headed(adjective, dull, silly, stupid)
2
absurd(adjective, weak, simple, silly)
2
birdbrained(silly, stupid, crazy, insane)
2
crazy(adjective, weak, simple, silly)
2
daffy(adjective, weak, simple, slow, silly)
2
dimwitted(adjective, dull, simple, silly)
2
dippy(weak, simple, silly, thoughtless)
2
ill-considered(adjective, weak, simple, silly)
2
inattentive(adjective, silly, senseless, unnecessary)
2
inept(adjective, simple, slow, careless)
2
injudicious(adjective, weak, simple, mind, think)
2
insane(weak, simple, silly, crazy)
2
jerky(adjective, weak, simple, silly)
2
naive(adjective, dull, simple, slow, careless)
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APASmart Define. (2016). unintelligent thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unintelligent/thesaurus/synonyms
ChicagoSmart Define. 2016. "unintelligent thesaurus" https://smartdefine.org/unintelligent/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, unintelligent thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unintelligent/thesaurus/synonyms>.
MLASmart Define. "unintelligent thesaurus" 24 March 2016. Web. 28 September 2026. <https://smartdefine.org/unintelligent/thesaurus/synonyms>