158 entries under harsh topic. ×

1
insensitive(adjective, hard, tough, cruel)
1
iron-fisted(adjective, mean, severe, cruel)
1
malicious(adjective, animal, mean, nasty)
1
mean machine(expression, adjective, mean, severe)
1
monstrous(adjective, severe, evil, nasty)
1
murderous(adjective, strong, hard, tough, severe)
1
poignant(adjective, evil, nasty, difficult)
1
punitive(adjective, hard, severe, sharp, nasty)
1
rancorous(adjective, mean, evil, nasty)
1
rapacious(adjective, violent, cruel, vicious)
1
ravening(adjective, violent, cruel, vicious)
1
revengeful(adjective, mean, evil, nasty)
1
rough(adjective, strong, hard, tough, severe)
1
rugged(adjective, strong, hard, tough, severe)
1
sadistic(adjective, mean, evil, nasty)
1
sanguinary(adjective, hard, tough, violent)
1
shameless(adjective, hard, tough, cruel)
1
sour(adjective, hard, tough, severe)
1
spiteful(adjective, mean, evil, nasty)
1
stony(adjective, mean, hard, cold)
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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>