400 entries under adjective topic. ×

5
languid(dull, quiet, weak, easy)
5
sluggish(calm, dull, quiet, weak)
5
tiresome(dull, simple, flat, ordinary)
4
lethargic(calm, dull, quiet, weak)
4
drab(dull, weak, simple, flat)
4
heavy(dull, quiet, weak, easy)
4
listless(calm, dull, quiet, weak)
4
monotone(dull, dark, gloomy, ordinary)
4
phlegmatic(calm, dull, weak, easy)
4
prosaic(dull, weak, simple, flat)
4
slow(dull, quiet, weak, easy)
4
soporific(dull, quiet, flat, slow)
4
spiritless(dull, weak, easy, sad)
4
stoic(calm, indifferent, unconcerned, impassive)
4
unexciting(dull, quiet, weak, flat)
3
arid(dull, flat, ordinary, dry)
3
banal(dull, weak, simple, plain)
3
banausic(dull, ordinary, boring, routine)
3
colorless(dull, weak, simple, flat)
3
colourless
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APASmart Define. (2016). blah thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/blah/thesaurus/synonyms
ChicagoSmart Define. 2016. "blah thesaurus" https://smartdefine.org/blah/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, blah thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/blah/thesaurus/synonyms>.
MLASmart Define. "blah thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/blah/thesaurus/synonyms>