127 entries under indifferent topic. ×

4
dry(adjective, calm, dull, cool, tough)
4
insensitive(adjective, dull, detached, unfeeling)
4
quiet(adjective, calm, easy, relaxed, heavy)
4
resigned(adjective, calm, quiet, cool)
3
callous(adjective, cool, detached, unfriendly)
3
laid-back(adjective, calm, dull, quiet, weak)
3
matter-of-fact(adjective, calm, dull, cool, simple)
3
passionless(adjective, calm, cool, detached)
3
unflappable(adjective, calm, quiet, cool)
2
blase(detached, distant, apathetic, unfeeling)
2
easy(adjective, calm, dull, quiet, weak)
2
heartless(adjective, cool, detached, blank)
2
heedless(adjective, dull, detached, distant)
2
latent(adjective, quiet, apathetic, lifeless)
2
long-suffering(adjective, calm, quiet, cool)
2
moony(adjective, dull, quiet, weak, easy)
2
motionless(adjective, quiet, still, apathetic)
2
quiescent(adjective, calm, quiet, smooth)
2
regardless(adjective, detached, distant, apathetic)
2
relaxed(adjective, calm, quiet, slow)
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APASmart Define. (2015). phlegmatic thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/phlegmatic/thesaurus/synonyms
ChicagoSmart Define. 2015. "phlegmatic thesaurus" https://smartdefine.org/phlegmatic/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, phlegmatic thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/phlegmatic/thesaurus/synonyms>.
MLASmart Define. "phlegmatic thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/phlegmatic/thesaurus/synonyms>