14
naive(adjective, dull, green, unsophisticated, unintelligent)
10
silly(adjective, foolish, stupid, senseless, absurd)
8
simple(adjective, dull, silly, foolish, stupid)
6
ingenuous
6
unsophisticated
5
childlike(adjective, unsophisticated)
5
moronic(adjective, dull, simple, silly, foolish)
5
slow(adjective, dull, simple, silly, foolish)
4
idiotic(adjective, dull, simple, silly, foolish)
4
stupid(adjective, dull, simple, silly, foolish)
4
artless
4
brainless(adjective, dull, simple, silly, foolish)
4
half-baked(dull, unintelligent, witless)
4
half-witted(dull, simple, silly, foolish, stupid)
4
imbecile
4
imbecilic(adjective, dull, silly, foolish, stupid)
4
innocent
3
crazy
3
doltish(adjective, dull, simple, silly, foolish)
3
feebleminded
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APASmart Define. (2015). simpleminded thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/simpleminded/thesaurus/synonyms
ChicagoSmart Define. 2015. "simpleminded thesaurus" https://smartdefine.org/simpleminded/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, simpleminded thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/simpleminded/thesaurus/synonyms>.
MLASmart Define. "simpleminded thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/simpleminded/thesaurus/synonyms>