4
insensitive(adjective, dull, indifferent, detached, unfeeling)
4
laggard(adjective, dull, quiet, easy, heavy)
4
leisurely(adjective, dull, quiet, weak, easy)
4
numb(adjective, still, unfeeling, lifeless, inactive)
4
numbed(adjective, unfeeling, numb, insensitive, dazed)
4
philosophical(adjective, calm, quiet, relaxed, casual)
4
quiet(adjective, calm, easy, relaxed, heavy)
4
resigned(adjective, calm, quiet, cool, indifferent)
4
restrained(adjective, unemotional, ironic, deadpan, understated)
4
slack(adjective, dull, quiet, moderate, easy)
4
stupefied(adjective, dull, stupid, idle, weary)
4
temperate(calm, composed, unflappable)
4
tired(adjective, slow, still, weary, sluggish)
4
unaffected(adjective, tough, rational, straightforward, sober)
4
undemonstrative(adjective, calm, cool, restrained, detached)
4
weary(adjective, dull, weak, easy, slow)
3
callous(adjective, cool, indifferent, detached, unfriendly)
3
desensitized(adjective, calm, unemotional, composed)
3
dragging(adjective, dull, slow, heavy, sluggish)
3
easygoing(calm, relaxed, peaceful, tranquil, indifference)
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APASmart Define. (2015). phlegmatic thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/phlegmatic/thesaurus/synonyms
ChicagoSmart Define. 2015. "phlegmatic thesaurus" https://smartdefine.org/phlegmatic/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, phlegmatic thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/phlegmatic/thesaurus/synonyms>.
MLASmart Define. "phlegmatic thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/phlegmatic/thesaurus/synonyms>