7 entries under simple topic. ×

14
stupid(adjective, ability, slow)
13
obtuse(adjective, ability, slow, stupid)
11
blockheaded(adjective, ability, slow, stupid)
11
boneheaded(adjective, slow, stupid)
10
doltish(adjective, ability, slow, stupid)
7
dumb(adjective, ability, slow, stupid)
5
brainless(adjective, slow, stupid)
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APASmart Define. (2015). thickheaded thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/thickheaded/thesaurus/synonyms
ChicagoSmart Define. 2015. "thickheaded thesaurus" https://smartdefine.org/thickheaded/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, thickheaded thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/thickheaded/thesaurus/synonyms>.
MLASmart Define. "thickheaded thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/thickheaded/thesaurus/synonyms>