188 entries under harsh topic. ×

3
unstoppable(adjective, cruel, determined, fierce)
3
vicious(adjective, mean, evil, nasty)
2
astringent(adjective, strong, hard, tough, severe)
2
authoritarian(adjective, strong, hard, tough, severe)
2
beastly(adjective, violent, vicious, fierce)
2
bestial(adjective, animal, mean, severe, evil)
2
bleak(adjective, appearance, hard, tough, severe)
2
bound(adjective, cruel, determined, fierce)
2
cold(adjective, close, mean, strong, hard)
2
ferocious(adjective, animal, mean, evil, nasty)
2
hard-core(adjective, strong, hard, tough, severe)
2
inhumane(adjective, animal, mean, hard, tough)
2
insensitive(adjective, hard, tough, cruel)
2
invariable(adjective, severe, solid, certain)
2
malevolent(adjective, mean, evil, nasty)
2
mean(adjective, animal, hard, severe, nasty)
2
sour(adjective, hard, tough, severe, sharp)
2
stringent(adjective, tough, severe, solid)
2
tyrannical(adjective, hard, tough, evil, nasty)
2
unalterable(adjective, close, set, severe)
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APASmart Define. (2015). unrelenting thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unrelenting/thesaurus/synonyms
ChicagoSmart Define. 2015. "unrelenting thesaurus" https://smartdefine.org/unrelenting/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, unrelenting thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unrelenting/thesaurus/synonyms>.
MLASmart Define. "unrelenting thesaurus" 3 August 2015. Web. 29 September 2026. <https://smartdefine.org/unrelenting/thesaurus/synonyms>