144 entries under plain topic. ×

1
clean(adjective, simple, pure, ordinary)
1
clear(verb, adjective, weak, mild)
1
folksy(adjective, simple, ordinary, boring)
1
frowzy(adjective, shabby, drab, dingy)
1
generic(mean, simple, ordinary, mediocre)
1
lenient(adjective, quiet, weak, kind, smooth)
1
lowly(adjective, simple, pure, common)
1
mean(adjective, simple, inferior, ordinary)
1
milk-and-water(adjective, weak, mild, boring)
1
nerdy(adjective, weak, mild, boring)
1
old hat(expression, adjective, set, flat)
1
outdated(adjective, shabby, drab, dingy)
1
pabulum(adjective, weak, simple, flat)
1
passé(hard, tired, old, sour)
1
plebeian(adjective, simple, flat, stupid)
1
practical(adjective, simple, tough, ordinary)
1
run-down(beat, dirty, shabby, exhausted)
1
second-rate(adjective, simple, inferior, ordinary)
1
smooth(adjective, calm, weak, kind, soft)
1
soothing(noun, adjective, quiet, weak, soft)
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APASmart Define. (2016). dull thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/dull/thesaurus/synonyms
ChicagoSmart Define. 2016. "dull thesaurus" https://smartdefine.org/dull/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, dull thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/dull/thesaurus/synonyms>.
MLASmart Define. "dull thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/dull/thesaurus/synonyms>