449 entries under adjective topic. ×

6
mortal(mean, severe, harsh, cruel)
6
resolved(determined, resolute, rigid, uncompromising)
6
rigorous(strong, hard, tough, severe)
6
strict(strong, hard, tough, severe)
6
unflinching(mean, severe, harsh, cruel)
6
unmoved(pitiless, intolerant)
6
unsympathetic(animal, mean, hard, tough)
5
bullheaded(strong, hard, tough, firm)
5
indurate(mean, hard, determined, resolute)
5
permanent(persistent, constant, continuous, endless)
5
perverse(mean, hard, tough, harsh)
5
rock-ribbed(determined, resolute, uncompromising, unshakeable)
5
stony(mean, hard, harsh, cruel)
5
unbroken(violent, vicious, fierce, persistent)
5
unceasing(persistent, constant, continuous, endless)
5
unfaltering
5
uninterrupted(persistent, constant, continuous, endless)
5
willful(determined, resolute, uncompromising, unshakeable)
4
barbarous(animal, appearance, mean, hard)
4
bitter(strong, hard, tough, severe)
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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>