40 entries under tough topic. ×

3
hard(adjective, harsh, cruel, grim)
2
callous(adjective, hard, unfeeling, unsympathetic)
2
hardened(adjective, hard, harsh, cruel)
2
obdurate(adjective, hard, unfeeling, unsympathetic)
1
avaricious(adjective, hard, harsh, cruel)
1
barbarous(adjective, hard, harsh, cruel)
1
bloody(adjective, hard, harsh, cruel)
1
fierce(adjective, hard, harsh, cruel)
1
forbidding(adjective, hard, harsh, cruel)
1
grim(adjective, hard, harsh, cruel)
1
hard-bitten(adjective, hard, grim, unfeeling)
1
hard-hearted(adjective, hard, harsh, cruel)
1
harsh(adjective, hard, cruel, grim)
1
impenitent(adjective, hard, harsh, cruel)
1
implacable(adjective, hard, harsh, cruel)
1
inexorable(adjective, hard, harsh, cruel)
1
inhuman(adjective, hard, harsh, cruel)
1
inhumane(adjective, hard, harsh, cruel)
1
insensitive(adjective, hard, harsh, cruel)
1
intolerant(adjective, hard, harsh, cruel)
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APASmart Define. (2015). unrepenting thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unrepenting/thesaurus/synonyms
ChicagoSmart Define. 2015. "unrepenting thesaurus" https://smartdefine.org/unrepenting/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, unrepenting thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unrepenting/thesaurus/synonyms>.
MLASmart Define. "unrepenting thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/unrepenting/thesaurus/synonyms>