161 entries under simple topic. ×

20
commonplace(noun, adjective, set, hard)
20
ordinary(adjective, common, boring, usual, commonplace)
17
dim-witted(adjective, slow, foolish, stupid)
17
slow-witted(adjective, ability, slow, stupid)
17
unimaginative(adjective, tough, flat, excite)
15
ho-hum(adjective, flat, plain, ordinary)
15
mundane(adjective, boring, ordinary, tedious)
15
plain(adjective, weak, tough, flat)
15
stale(adjective, set, hard, weak)
14
colorless(adjective, beat, light, weak)
14
weak(adjective, hard, light, soft)
13
backward(adjective, ability, low, slow)
13
irksome(adjective, excite, plain, stupid)
13
moronic(adjective, slow, silly, foolish)
13
muted(adjective, quiet, weak, soft)
13
routine(noun, adjective, set, weak)
13
tame(adjective, weak, kind, soft)
12
dopey(adjective, quiet, flat, low)
12
trite(adjective, set, hard, flat)
12
uninspiring(adjective, boring, uninteresting, tedious, dreary)
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APASmart Define. (2016). dull thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/dull/thesaurus/synonyms
ChicagoSmart Define. 2016. "dull thesaurus" https://smartdefine.org/dull/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, dull thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/dull/thesaurus/synonyms>.
MLASmart Define. "dull thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/dull/thesaurus/synonyms>