59 entries under slow topic. ×

9
unintelligent(adjective, dull, simple, silly)
8
blockheaded(adjective, dull, simple, ability)
8
witless(adjective, dull, simple, silly)
7
ignorant(adjective, dull, simple, silly)
7
vacuous(adjective, simple, stupid, empty)
6
backward(adjective, dull, simple, silly)
6
daft(adjective, simple, silly, foolish)
6
half-baked(adjective, dull, simple, silly)
6
senseless(adjective, dull, simple, silly)
6
thickheaded(adjective, simple, ability, stupid)
5
weak-minded(adjective, dull, simple, stupid)
5
boneheaded(adjective, simple, stupid, impulsive)
5
mindless(adjective, dull, simple, silly)
4
simple-minded(adjective, dull, simple, silly)
4
daffy(adjective, simple, silly, foolish)
4
lumpish(adjective, dull, simple, heavy)
4
oafish(adjective, dull, simple, stupid)
3
insensate(adjective, dull, simple, informal)
3
numskulled(adjective, dull, simple, stupid)
3
scatterbrained(adjective, simple, silly, foolish)
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APASmart Define. (2016). dumb thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/dumb/thesaurus/synonyms
ChicagoSmart Define. 2016. "dumb thesaurus" https://smartdefine.org/dumb/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, dumb thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/dumb/thesaurus/synonyms>.
MLASmart Define. "dumb thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/dumb/thesaurus/synonyms>