93 entries under pitiless topic. ×

1
excruciating(adjective, evil, nasty, harsh, vicious)
1
gratuitous(adjective, mean, severe, harsh, cruel)
1
hardhearted(adjective, mean, severe, harsh, cruel)
1
hatchet job(expression, adjective, mean, severe, harsh)
1
hateful(adjective, animal, mean, evil, nasty)
1
having a killer instinct(expression, adjective, idiom, mean, severe)
1
hellish(adjective, evil, nasty, harsh, violent)
1
intolerant(adjective, hard, tough, harsh, cruel)
1
iron-fisted(adjective, mean, severe, harsh, cruel)
1
ironfisted(adjective, mean, harsh, cruel, vicious)
1
malicious(adjective, animal, mean, nasty, harsh)
1
mean machine(expression, adjective, mean, severe, harsh)
1
monstrous(adjective, severe, evil, nasty, harsh)
1
painful(adjective, tough, evil, nasty, harsh)
1
pernicious(adjective, evil, nasty, harsh, vicious)
1
poignant(adjective, evil, nasty, harsh, vicious)
1
rancorous(adjective, mean, tough, evil, nasty)
1
revengeful(adjective, mean, evil, nasty, harsh)
1
sadistic(adjective, mean, evil, nasty, harsh)
1
sinful(adjective, evil, nasty, harsh, vicious)
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APASmart Define. (2015). unrelenting thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unrelenting/thesaurus/synonyms
ChicagoSmart Define. 2015. "unrelenting thesaurus" https://smartdefine.org/unrelenting/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, unrelenting thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unrelenting/thesaurus/synonyms>.
MLASmart Define. "unrelenting thesaurus" 3 August 2015. Web. 28 September 2026. <https://smartdefine.org/unrelenting/thesaurus/synonyms>