124 entries under mean topic. ×

3
vindictive(adjective, hard, tough, severe)
2
animal(noun, adjective, strong, severe)
2
cold(adjective, close, strong, hard)
2
dog-eat-dog(adjective, hard, severe, harsh)
2
fell(adjective, animal, strong, severe)
2
hardhearted(adjective, hard, severe, harsh)
2
inhumane(adjective, animal, hard, tough)
2
malevolent(adjective, strong, severe, evil)
2
vicious(adjective, strong, severe, evil)
1
barbaric(adjective, animal, violent, cruel)
1
bestial(adjective, animal, severe, evil)
1
bullhead(adjective, hard, tough, harsh)
1
cold fish(expression, adjective, hard, stubborn)
1
coldblooded(adjective, hard, harsh, cold)
1
coldhearted(adjective, hard, severe, harsh)
1
compassionless(adjective, hard, severe, harsh)
1
devilish(adjective, animal, harsh, violent)
1
diabolical(adjective, animal, harsh, violent)
1
feral(adjective, strong, severe, harsh)
1
gratuitous(adjective, severe, harsh, cruel)
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APASmart Define. (2015). relentless thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/relentless/thesaurus/synonyms
ChicagoSmart Define. 2015. "relentless thesaurus" https://smartdefine.org/relentless/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, relentless thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/relentless/thesaurus/synonyms>.
MLASmart Define. "relentless thesaurus" 24 June 2015. Web. 26 September 2026. <https://smartdefine.org/relentless/thesaurus/synonyms>