Synonyms|834Antonyms|176|Broader|7Narrower|0Related|653

75 entries under plain topic. ×

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)
32
flat(adjective, dull, quiet, weak, simple)
31
prosaic(adjective, dull, weak, simple, flat)
23
dry(adjective, dull, simple, flat, excite)
20
commonplace(adjective, dull, simple, flat)
19
insipid(adjective, dull, weak, simple, flat)
16
ordinary(adjective, boring, dull, flat, dry)
16
dead(adjective, dull, quiet, weak, simple)
16
banal(adjective, dull, weak, simple, flat)
12
routine(noun, adjective, dull, quiet, weak)
12
unexciting(adjective, dull, quiet, weak, flat)
11
ho-hum(adjective, dull, simple, ordinary)
11
vapid(adjective, dull, weak, simple, flat)
10
bland(adjective, dull, quiet, weak, soft)
10
common(adjective, ordinary, boring, dull, flat)
10
pedestrian(adjective, dull, simple, ordinary)
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APASmart Define. (2015). monotonous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/monotonous/thesaurus/synonyms
ChicagoSmart Define. 2015. "monotonous thesaurus" https://smartdefine.org/monotonous/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, monotonous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/monotonous/thesaurus/synonyms>.
MLASmart Define. "monotonous thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/monotonous/thesaurus/synonyms>