1,185 entry under adjective topic. ×

25
sluggish(calm, increase, weak, flat)
24
bland(quiet, weak, kind, soft)
24
dry(calm, hard, simple, tough)
23
dumb(verb, calm, quiet, simple)
23
dark(characteristic, unhappy, gloomy, dirty)
23
dense(simple, slow, dark, gloomy)
23
dismal(upset, obscure, unhappy, dark)
23
heavy(upset, quiet, severe, warm)
23
numb(noun, verb, quiet, develop)
23
stolid(noun, calm, simple, tough)
23
torpid(quiet, flat, low, sad)
22
inactive(action, quiet, low, slow)
22
thick(simple, obscure, warm, slow)
22
vapid(boring, uninteresting, flat, tedious)
21
dingy(characteristic, flat, dark, gloomy)
21
doltish(simple, slow, careless, foolish)
21
leaden(quiet, severe, flat, slow)
20
commonplace(noun, set, hard, simple)
20
jejune(noun, set, weak, kind)
20
ordinary(common, boring, usual, commonplace)
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APASmart Define. (2016). dull thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/dull/thesaurus/synonyms
ChicagoSmart Define. 2016. "dull thesaurus" https://smartdefine.org/dull/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, dull thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/dull/thesaurus/synonyms>.
MLASmart Define. "dull thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/dull/thesaurus/synonyms>