604 entries under adjective topic. ×

12
dispassionate(calm, cool, cold, indifferent)
12
dull(noun, verb, quiet, develop)
12
insensate(noun, bad, hard, tough)
11
aloof(calm, mean, hard, cool)
11
dead(dull, quiet, flat, cold)
11
insentient(bad, hard, cold, cruel)
10
frigid(mean, hard, cool, harsh)
10
inflexible(person, hard, tough, rough)
10
senseless(bad, hard, tough, severe)
10
severe(calm, mean, hard, tough)
9
barbarous(mean, hard, severe, evil)
9
pachydermatous(noun, insensibility, physical insensibility)
9
stiff(set, strong, hard, severe)
9
stony-hearted(cold, cruel, unfeeling, unsympathetic)
9
unmerciful(mean, severe, harsh, cruel)
9
unmoved(calm, mean, hard, cool)
8
atrocious(evil, nasty, harsh, cruel)
8
firm(verb, close, set, fix)
8
impassible(quiet, bad, cold, indifferent)
8
obtuse(noun, hard, indifferent, apathetic)
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APASmart Define. (2016). callous thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/callous/thesaurus/synonyms
ChicagoSmart Define. 2016. "callous thesaurus" https://smartdefine.org/callous/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, callous thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/callous/thesaurus/synonyms>.
MLASmart Define. "callous thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/callous/thesaurus/synonyms>