49 entries under callous topic. ×

8
unforgiving(adjective, mean, severe, harsh, cruel)
7
barbarous(adjective, animal, mean, harsh, violent)
7
cold-blooded(adjective, mean, hard, harsh, violent)
7
unfeeling(adjective, animal, mean, hard, severe)
6
adamant(adjective, mean, tough, harsh, resist)
5
unsympathetic(adjective, animal, mean, hard, harsh)
4
sadistic(adjective, mean, harsh, violent, cruel)
4
severe(adjective, mean, harsh, cruel, vicious)
4
vicious(adjective, mean, harsh, violent, cruel)
4
vindictive(adjective, mean, severe, harsh, cruel)
3
ferocious(adjective, animal, mean, harsh, violent)
2
dog-eat-dog(adjective, mean, hard, severe, harsh)
2
feral(adjective, mean, severe, harsh, violent)
2
hardhearted(adjective, mean, hard, harsh, cold)
2
mortal(adjective, mean, severe, harsh, cruel)
2
rancorous(adjective, mean, harsh, cruel, vicious)
1
cold(adjective, mean, hard, harsh, indifferent)
1
cutthroat(adjective, mean, hard, severe, harsh)
1
ironfisted(adjective, mean, severe, harsh, cruel)
1
malevolent(adjective, mean, harsh, violent, cruel)
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APASmart Define. (2016). remorseless thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/remorseless/thesaurus/synonyms
ChicagoSmart Define. 2016. "remorseless thesaurus" https://smartdefine.org/remorseless/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, remorseless thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/remorseless/thesaurus/synonyms>.
MLASmart Define. "remorseless thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/remorseless/thesaurus/synonyms>