63
dull(adjective, boring, uninteresting, uneventful, flat)
53
boring(adjective, dreary, colorless, dull, drab)
49
uninteresting(adjective, boring, flat, dull, ordinary)
45
tedious(adjective, boring, flat, dull, ordinary)
39
humdrum(adjective, dull, weak, simple, flat)
36
tiresome(adjective, dull, simple, flat, excite)
32
flat(adjective, dull, quiet, weak, simple)
31
prosaic(adjective, dull, weak, simple, flat)
29
wearisome(adjective, boring, dull, tedious, simple)
23
dry(adjective, dull, simple, flat, excite)
22
dreary(adjective, dull, simple, flat, excite)
20
commonplace(adjective, dull, simple, flat, plain)
19
insipid(adjective, dull, weak, simple, flat)
18
unsurprising
17
soul-crushing
16
ordinary(adjective, boring, dull, flat, dry)
16
dead(adjective, dull, quiet, weak, simple)
16
banal(adjective, dull, weak, simple, flat)
14
unvarying(adjective, dull, quiet, soft, gentle)
14
tiring(adjective, dull, tedious, stupid, boring)
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APASmart Define. (2015). monotonous thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/monotonous/thesaurus/synonyms
ChicagoSmart Define. 2015. "monotonous thesaurus" https://smartdefine.org/monotonous/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, monotonous thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/monotonous/thesaurus/synonyms>.
MLASmart Define. "monotonous thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/monotonous/thesaurus/synonyms>