128 entries under dull topic. ×

4
naive(unintelligent, witless)
4
oafish(adjective, simple, slow, stupid)
3
opaque(adjective, silly, foolish, stupid)
3
inert(adjective, heavy, stupid, impassive)
3
insensate(adjective, simple, slow, informal)
3
numskulled(adjective, simple, slow, stupid)
3
sluggish(adjective, simple, slow, silly)
2
heavy(adjective, silly, stupid, impassive)
2
laughable(adjective, unintelligent, witless)
2
choke off(verb, expression, phrasal verb, calm)
2
clam(verb, calm, quiet, suppress)
2
clam up(verb, expression, phrasal verb, calm)
2
close up(verb, expression, phrasal verb, calm)
2
cool it(verb, expression, phrasal verb, calm)
2
cut off(verb, expression, calm, quiet)
2
cut short(verb, expression, calm, quiet)
2
dampen(verb, calm, quiet, suppress)
2
dazed(shaky, faint, confused, unintelligent)
2
deaden(verb, calm, quiet, suppress)
2
decrease the volume(verb, expression, idiom, calm)
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APASmart Define. (2016). dumb thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/dumb/thesaurus/synonyms
ChicagoSmart Define. 2016. "dumb thesaurus" https://smartdefine.org/dumb/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, dumb thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/dumb/thesaurus/synonyms>.
MLASmart Define. "dumb thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/dumb/thesaurus/synonyms>