149 entries under plain topic. ×

6
boring(adjective, ordinary, dull, flat, dry)
6
like(adjective, calm, smooth, flat)
6
tedious(adjective, boring, dull, flat, ordinary)
6
uninspiring(adjective, boring, flat, ordinary, dry)
5
flat(noun, adjective, calm, dull, set)
5
household(noun, adjective, dull, mean, simple)
5
old hat(expression, adjective, characteristic, dull, set)
4
acclimated(adjective, habitual, climate)
4
dry(adjective, dull, hard, simple, flat)
4
lowborn(adjective, mean, simple, gentle, poor)
4
no great shakes(expression, adjective, idiom, dull, mean)
4
obscure(adjective, mean, simple, lower, gentle)
4
prosy(adjective, dull, simple, flat, rough)
4
servile(adjective, mean, simple, lower, rough)
3
basin(noun, hole, pool, pit)
3
bush(noun, plant, green, leaf)
3
level(noun, adjective, smooth, flat)
3
menial(adjective, mean, simple, lower, obscure)
3
vapid(adjective, dull, set, simple, flat)
2
akin(adjective, calm, smooth, flat)
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APASmart Define. (2016). common thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/common/thesaurus/synonyms
ChicagoSmart Define. 2016. "common thesaurus" https://smartdefine.org/common/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, common thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/common/thesaurus/synonyms>.
MLASmart Define. "common thesaurus" 23 March 2016. Web. 21 September 2026. <https://smartdefine.org/common/thesaurus/synonyms>