144 entries under plain topic. ×

2
shabby(adjective, dirty, monotonous, distressed)
2
sloppy(adjective, flat, gloomy, loose)
2
slovenly(adjective, shabby, drab, dingy)
2
so-so(simple, indifferent, inferior, ordinary)
2
tacky(adjective, dirty, shabby, distressed)
2
ugly(adjective, upset, rough, low)
2
unattractive(adjective, unpleasant, common, disgusting)
2
unfashionable(adjective, shabby, drab, tacky)
2
unkempt(adjective, shabby, drab, tacky)
2
unmemorable(adjective, simple, ordinary, modest)
2
unpleasant(adjective, nasty, disgusting, disagreeable)
2
unseemly(adjective, rough, low, offensive)
2
unstimulating(adjective, weak, mild, boring)
2
vanilla(adjective, weak, simple, flat)
2
zero(adjective, weak, simple, flat, low)
1
antiquated(adjective, hard, old, sour)
1
baggy(shabby, drab, dingy, unfashionable)
1
balmy(noun, adjective, calm, quiet, weak)
1
bedraggled(shabby, distressed, drab, worn)
1
blowsy(shabby, drab, dingy, unfashionable)
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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>