128 entries under dull topic. ×

46
stupid(noun, adjective, simple, ability)
38
foolish(adjective, simple, slow, silly)
26
idiotic(adjective, simple, slow, silly)
24
mute(adjective, calm, close, quiet)
24
moronic(adjective, simple, slow, silly)
23
doltish(adjective, simple, ability, slow)
22
thick(adjective, simple, ability, slow)
22
dense(adjective, simple, ability, slow)
20
dim-witted(adjective, simple, slow, foolish)
19
dim(adjective, simple, slow, foolish)
15
obtuse(adjective, simple, ability, slow)
15
brainless(adjective, simple, slow, silly)
14
slow(adjective, simple, heavy, silly)
14
feeble-minded(adjective, simple, slow, foolish)
13
dopey(adjective, simple, slang, ability)
12
quiet(verb, adjective, calm, close)
11
simple(adjective, slow, silly, foolish)
11
half-witted(adjective, simple, slow, silly)
11
imbecilic(adjective, simple, slow, silly)
11
inane(adjective, simple, slow, silly)
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APASmart Define. (2016). dumb thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/dumb/thesaurus/synonyms
ChicagoSmart Define. 2016. "dumb thesaurus" https://smartdefine.org/dumb/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, dumb thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/dumb/thesaurus/synonyms>.
MLASmart Define. "dumb thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/dumb/thesaurus/synonyms>