449 entries under adjective topic. ×

3
single-minded(tough, firm, harsh, cruel)
3
strong-willed(determined, resolute, uncompromising, unshakeable)
3
unabated
3
unchangeable(hard, resolute, rigid, inflexible)
3
unrelieved
3
unstoppable(harsh, cruel, determined, fierce)
3
vicious(mean, evil, nasty, harsh)
2
astringent(strong, hard, tough, severe)
2
authoritarian(strong, hard, tough, severe)
2
barbaric(animal, mean, violent, cruel)
2
beastly(harsh, violent, vicious, fierce)
2
bestial(animal, mean, severe, evil)
2
bleak(appearance, hard, tough, severe)
2
bound(harsh, cruel, determined, fierce)
2
bull-headed(determined, resolute, obstinate, uncompromising)
2
chronic(persistent, constant, continuous, endless)
2
cold(close, mean, strong, hard)
2
demanding
2
emphatic
2
eternal(certain, persistent, constant, reliable)
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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>