151 entries under severe topic. ×

4
flinty(adjective, close, strong, hard, tough)
4
heartless(adjective, mean, evil, nasty)
4
unfeeling(adjective, animal, mean, hard, tough)
4
unsparing(adjective, mean, strong, hard, tough)
3
fierce(adjective, animal, mean, hard, tough)
3
forbidding(adjective, close, appearance, strong, hard)
3
rude(adjective, hard, sharp, nasty)
2
astringent(adjective, strong, hard, tough)
2
authoritarian(adjective, strong, hard, tough)
2
bestial(adjective, animal, mean, evil)
2
bleak(adjective, appearance, hard, tough)
2
cold(adjective, close, mean, strong, hard)
2
hard-core(adjective, strong, hard, tough)
2
inhumane(adjective, animal, mean, hard, tough)
2
invariable(adjective, harsh, solid, certain)
2
mean(adjective, animal, hard, nasty)
2
sour(adjective, hard, tough, sharp)
2
stringent(adjective, tough, harsh, solid)
2
unalterable(adjective, close, set, harsh)
2
undeviating(adjective, harsh, solid, cruel)
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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>