476 entries under adjective topic. ×

10
blank(cool, indifferent, detached, sober)
10
dry(calm, dull, cool, tough)
10
passionless(calm, dull, cool, slow)
10
unaffected(hard, tough, temper, careless)
9
incurious(calm, hard, cool, relaxed)
9
lackadaisical(calm, dull, cool, weak)
9
lethargic(calm, dull, weak, easy)
9
reserved(calm, cool, indifferent, restrained)
8
collected(calm, quiet, cool, moderate)
8
controlled
8
heartless(hard, cool, careless, indifferent)
8
insouciant(calm, cool, relaxed, cold)
8
matter-of-fact(calm, dull, cool, simple)
8
neutral(calm, quiet, cool, moderate)
8
numb(still, aloof, unfeeling, senseless)
8
spiritless(dull, hard, cool, weak)
8
unexcitable(calm, dull, quiet, cool)
8
unexpressive
7
inert(dull, weak, moving, easy)
7
insusceptible(hard, cool, affect, dead)
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APASmart Define. (2015). impassive thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/impassive/thesaurus/synonyms
ChicagoSmart Define. 2015. "impassive thesaurus" https://smartdefine.org/impassive/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, impassive thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/impassive/thesaurus/synonyms>.
MLASmart Define. "impassive thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/impassive/thesaurus/synonyms>