476 entries under adjective topic. ×

6
obtuse(dull, hard, slow, stupid)
6
quiescent(quiet, cool, secure, still)
6
restful(quiet, cool, moderate, gentle)
6
still(quiet, cool, moderate, gentle)
6
undisturbed(quiet, cool, moderate, gentle)
6
wooden(dull, cool, dead, blank)
5
apathetical(temper, cold, negative, dead)
5
dense(dull, slow, stupid, unresponsive)
5
distant(cool, indifferent, restrained, detached)
5
halfhearted(temper, cold, negative, enthusiasm)
5
hard-hearted(calm, indifferent, restrained, detached)
5
inexpressive(dull, cool, detached, dead)
5
lukewarm(calm, cool, temper, relaxed)
5
reticent(cool, restrained, detached, blank)
5
self-controlled(calm, quiet, cool, relaxed)
5
smooth(calm, quiet, cool, relaxed)
5
soulless(hard, careless, indifferent, cruel)
5
undemonstrative(calm, cool, restrained, detached)
4
coldhearted(dull, hard, slow, detached)
4
dead(cold, still, lifeless, apathy)
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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>