97 entries under tedious topic. ×

12
stupid(adjective, flat, dry, dreary, colorless)
11
colorless(adjective, dreary, dull, uninteresting)
11
unimaginative(adjective, dull, flat, ordinary, dry)
11
hackneyed(adjective, dull, simple, flat, plain)
11
run-of-the-mill(adjective, flat, ordinary, dry, uninteresting)
10
heavy(adjective, dull, flat, ordinary, dry)
10
lackluster(adjective, dull, lifeless, uninteresting, feeling)
10
soporific(adjective, dull, flat, ordinary, dry)
9
drudging(adjective, dreary, dull, drab)
8
annoying(adjective, dull, irritating, exasperating)
8
jading(adjective, dull, irritating, exasperating)
8
spiritless(adjective, dull, feeling, weak, dead)
7
blah(adjective, dull, quiet, weak, simple)
7
depressing(adjective, dull, property, gloomy, miserable)
7
dim(adjective, dull, weak, simple, flat)
7
mind-numbing(adjective, feeling, boredom, dreary, drab)
7
unvaried(adjective, dreary, feeling, boredom, dull)
6
prolix(adjective, flat, stupid, ordinary, dry)
6
burdensome(adjective, dull, tired, irritating)
6
common(adjective, ordinary, dull, flat, dry)
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APASmart Define. (2016). boring thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/boring/thesaurus/synonyms
ChicagoSmart Define. 2016. "boring thesaurus" https://smartdefine.org/boring/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, boring thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/boring/thesaurus/synonyms>.
MLASmart Define. "boring thesaurus" 30 March 2016. Web. 21 September 2026. <https://smartdefine.org/boring/thesaurus/synonyms>