120 entries under dull topic. ×

31
apathetic(adjective, calm, quiet, cool)
30
indifferent(adjective, calm, quiet, cool)
25
listless(adjective, calm, quiet, weak)
25
stoic(adjective, calm, cool, tough)
23
sluggish(adjective, calm, quiet, weak)
22
languid(adjective, weak, easy, slow)
20
lethargic(adjective, calm, quiet, weak)
18
impassive(adjective, calm, quiet, cool)
18
slow(adjective, weak, easy, slow)
17
lackadaisical(adjective, quiet, weak, easy)
16
stolid(adjective, calm, quiet, cool)
15
passive(adjective, calm, quiet, easy)
15
unconcerned(adjective, calm, cool, weak)
15
unemotional(adjective, calm, quiet, cool)
14
torpid(adjective, quiet, weak, easy)
12
inert(adjective, quiet, weak, moving)
12
insouciant(adjective, indifferent, unsympathetic, sluggish)
12
uninterested(adjective, cool, weak, easy)
11
inactive(adjective, quiet, weak, easy)
11
languorous(adjective, weak, easy, slow)
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APASmart Define. (2015). phlegmatic thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/phlegmatic/thesaurus/synonyms
ChicagoSmart Define. 2015. "phlegmatic thesaurus" https://smartdefine.org/phlegmatic/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, phlegmatic thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/phlegmatic/thesaurus/synonyms>.
MLASmart Define. "phlegmatic thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/phlegmatic/thesaurus/synonyms>