128 entries under dull topic. ×

1
regular(adjective, quiet, flat, slow)
1
romantic(adjective, careless, relaxed, indifferent)
1
sentimental(adjective, careless, relaxed, indifferent)
1
sleepyhead(adjective, weak, easy, slow)
1
sleepyheaded(adjective, slow, heavy, sluggish)
1
somber(upset, hostile, gray, steely)
1
spring fever(expression, adjective, careless, indifferent)
1
stiff(adjective, slow, sluggish, lifeless)
1
stupid(adjective, heavy, apathetic, sluggish)
1
tired(adjective, slow, careless, indifferent)
1
trifling(idle, sluggish, inactive, lethargic)
1
unenergetic(idle, sluggish, lazy, inactive)
1
unenthusiastic(adjective, weak, easy, slow)
1
unhurried(adjective, quiet, weak, easy)
1
unindustrious(idle, sluggish, inactive, lethargic)
1
unpersevering(idle, sluggish, inactive, lethargic)
1
unsympathetic(adjective, quiet, flat, heavy)
1
wimpy(adjective, weak, easy, slow)
0
dense(adjective, heavy, stupid, impassive)
0
doltish(adjective, heavy, stupid, impassive)
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APASmart Define. (2015). inert thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/inert/thesaurus/synonyms
ChicagoSmart Define. 2015. "inert thesaurus" https://smartdefine.org/inert/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, inert thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/inert/thesaurus/synonyms>.
MLASmart Define. "inert thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/inert/thesaurus/synonyms>