49 entries under callous topic. ×

9
severe(adjective, person, mean, hard, rough)
9
stony(adjective, person, mean, hard, harsh)
9
unyielding(adjective, mean, hard, tough, severe)
6
dog-eat-dog(adjective, mean, hard, severe, harsh)
6
obdurate(adjective, person, mean, hard, rough)
6
vindictive(adjective, mean, hard, tough, severe)
5
cutthroat(adjective, mean, hard, severe, harsh)
5
inhuman(adjective, person, mean, hard, tough)
5
revengeful(adjective, mean, harsh, cruel, vicious)
5
savage(adjective, mean, hard, tough, severe)
4
barbarous(adjective, mean, hard, tough, severe)
4
cold-blooded(adjective, person, mean, hard, harsh)
4
hard-hearted(adjective, mean, hard, tough, harsh)
4
hardhearted(adjective, mean, hard, severe, harsh)
4
sadistic(adjective, person, mean, harsh, cruel)
3
fierce(adjective, mean, hard, tough, severe)
3
malevolent(adjective, mean, harsh, cruel, vicious)
3
rancorous(adjective, mean, harsh, cruel, vicious)
3
vicious(adjective, mean, hard, severe, rough)
2
feral(adjective, mean, harsh, cruel, vicious)
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APASmart Define. (2016). unforgiving thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unforgiving/thesaurus/synonyms
ChicagoSmart Define. 2016. "unforgiving thesaurus" https://smartdefine.org/unforgiving/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, unforgiving thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unforgiving/thesaurus/synonyms>.
MLASmart Define. "unforgiving thesaurus" 24 March 2016. Web. 29 September 2026. <https://smartdefine.org/unforgiving/thesaurus/synonyms>