91 entries under apathetic topic. ×

6
flat(adjective, calm, quiet, tough, indifferent)
6
idle(adjective, quiet, easy, heavy, indifferent)
6
sleepy(adjective, quiet, easy, slow, relaxed)
6
uninvolved(adjective, calm, quiet, indifferent, detached)
5
aloof(adjective, calm, cool, indifferent, restrained)
5
incurious(adjective, indifferent, feelings, restrained)
4
distant(adjective, cool, indifferent, restrained, detached)
4
quiet(adjective, calm, easy, relaxed, heavy)
4
resigned(adjective, calm, quiet, cool, indifferent)
4
stupefied(adjective, dull, stupid, idle, weary)
3
callous(adjective, cool, indifferent, detached, unfriendly)
3
laid-back(adjective, calm, dull, quiet, weak)
3
passionless(adjective, calm, cool, indifferent, detached)
3
somnolent(adjective, dull, relaxed, stupid, weary)
3
unflappable(adjective, calm, quiet, cool, indifferent)
2
blase(indifferent, detached, distant, unfeeling)
2
debilitated(adjective, dull, stupid, idle, weary)
2
dormant(adjective, dull, stupid, still, weary)
2
heartless(adjective, cool, indifferent, detached, blank)
2
heedless(adjective, dull, indifferent, detached, distant)
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APASmart Define. (2015). phlegmatic thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/phlegmatic/thesaurus/synonyms
ChicagoSmart Define. 2015. "phlegmatic thesaurus" https://smartdefine.org/phlegmatic/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, phlegmatic thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/phlegmatic/thesaurus/synonyms>.
MLASmart Define. "phlegmatic thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/phlegmatic/thesaurus/synonyms>