73 entries under plain topic. ×

81
boring(adjective, dull, dreary, monotonous, colorless)
56
dull(adjective, boring, uninteresting, dreary, monotonous)
39
uninteresting(adjective, dull, boring, monotonous, ordinary)
31
monotonous(adjective, boring, dull, ordinary, dreary)
30
humdrum(adjective, dull, weak, simple, flat)
25
prosaic(adjective, dull, weak, simple, flat)
25
dry(adjective, dull, simple, flat, excite)
22
insipid(adjective, dull, weak, simple, flat)
22
lifeless(adjective, dull, weak, simple)
21
flat(adjective, dull, weak, simple)
19
ho-hum(adjective, dull, simple, ordinary)
18
vapid(adjective, dull, weak, simple, flat)
17
irksome(adjective, dull, simple, excite)
15
banal(adjective, dull, weak, simple)
13
bland(adjective, dull, weak, mild)
13
commonplace(adjective, dull, simple, flat)
12
dead(adjective, dull, weak, simple, flat)
12
ordinary(adjective, boring, dull, flat, dry)
12
unexciting(adjective, dull, weak, mild)
11
drab(adjective, dull, weak, simple)
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APASmart Define. (2015). tedious thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/tedious/thesaurus/synonyms
ChicagoSmart Define. 2015. "tedious thesaurus" https://smartdefine.org/tedious/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, tedious thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/tedious/thesaurus/synonyms>.
MLASmart Define. "tedious thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/tedious/thesaurus/synonyms>