449 entries under adjective topic. ×

2
everlasting(persistent, constant, continuous, endless)
2
ferocious(animal, mean, evil, nasty)
2
habitual(persistent, continuous, endless, relentless)
2
hard-core(strong, hard, tough, severe)
2
haunting
2
immutable(set, hard, stiff, persistent)
2
importunate
2
inalterable
2
indifferent(rocky, pebbly, flinty)
2
indomitable(set, strong, hard, tough)
2
inhumane(animal, mean, hard, tough)
2
insensitive(hard, tough, harsh, cruel)
2
interminable(determined, steady, resolute, persistent)
2
invariable(severe, harsh, solid, certain)
2
macabre
2
malevolent(mean, evil, nasty, harsh)
2
mean(animal, hard, severe, nasty)
2
mordant
2
nagging
2
persisting(determined, active, steady, resolute)
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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>