116 entries under impassive topic. ×

3
imperturbable(adjective, calm, cool, cold, cruel)
3
lukewarm(adjective, calm, mean, hard, cool)
3
phlegmatic(adjective, cool, indifferent, detached, unfriendly)
3
stoic(adjective, cool, cold, indifferent, blank)
3
stubborn(adjective, mean, hard, tough, severe)
2
glacial(adjective, person, feelings, detached)
2
unimpassioned(adjective, calm, restrained, unfriendly, subdued)
2
unimpressionable(adjective, hard, cruel, detached, unfeeling)
2
unstirred(adjective, calm, mean, hard, cool)
1
blah(adjective, indifferent, detached, unconcerned)
1
calm(adjective, cold, indifferent, restrained, unconcerned)
1
casual(adjective, calm, restrained, unfeeling, unconcerned)
1
collected(adjective, calm, cool, cold, indifferent)
1
composed(adjective, calm, cool, restrained, detached)
1
deadpan(adjective, detached, blank, unemotional)
1
disciplined(verb, adjective, calm, dull, restrained)
1
easy-going(adjective, calm, restrained, unconcerned, subdued)
1
flat(adjective, dull, quiet, heavy, indifferent)
1
inexpressive(adjective, cool, detached, blank, aloof)
1
laid-back(adjective, calm, indifferent, restrained, detached)
10 years ago|20k views|share |citing 
APASmart Define. (2016). callous thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/callous/thesaurus/synonyms
ChicagoSmart Define. 2016. "callous thesaurus" https://smartdefine.org/callous/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, callous thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/callous/thesaurus/synonyms>.
MLASmart Define. "callous thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/callous/thesaurus/synonyms>