121 entries under merciless topic. ×

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)
1
spiteful(adjective, mean, evil, nasty, harsh)
1
stop at nothing(expression, adjective, idiom, harsh, cruel)
1
unkind(adjective, animal, mean, hard, tough)
1
unnatural(adjective, strong, evil, nasty, harsh)
1
vengeful(adjective, mean, tough, severe, evil)
1
virulent(adjective, evil, nasty, harsh, vicious)
1
wicked(adjective, hard, severe, evil, sharp)
0
brick-wall
0
feral(adjective, mean, harsh, violent, cruel)
0
hard-headed
0
killer(adjective, mean, harsh, cruel, vicious)
0
nasty(adjective, mean, hard, severe, sharp)
0
surly(adjective, mean, harsh, cruel, vicious)
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APASmart Define. (2015). unrelenting thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/unrelenting/thesaurus/synonyms
ChicagoSmart Define. 2015. "unrelenting thesaurus" https://smartdefine.org/unrelenting/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, unrelenting thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/unrelenting/thesaurus/synonyms>.
MLASmart Define. "unrelenting thesaurus" 3 August 2015. Web. 1 October 2026. <https://smartdefine.org/unrelenting/thesaurus/synonyms>