169 entries under cruel topic. ×

6
unsympathetic(adjective, animal, mean, hard, tough)
5
perverse(adjective, mean, hard, tough, harsh)
5
stony(adjective, mean, hard, harsh)
4
barbarous(adjective, animal, appearance, mean, hard)
4
bitter(adjective, strong, hard, tough, severe)
4
brutal(adjective, mean, hard, tough, severe)
4
callous(adjective, mean, hard, tough, severe)
4
dour(adjective, close, hard, tough, severe)
4
exacting(adjective, tough, severe, harsh)
4
fell(adjective, animal, mean, harsh, violent)
4
flinty(adjective, close, strong, hard, tough)
4
grinding
4
hard-hearted(adjective, mean, hard, tough, evil)
4
heartless(adjective, mean, severe, evil, nasty)
4
oppressive
4
uncompassionate(adjective, animal, mean, hard, tough)
4
unfeeling(adjective, animal, mean, hard, tough)
4
unsparing(adjective, mean, strong, hard, tough)
3
bound and determined(expression, adjective, idiom, harsh)
3
fierce(adjective, animal, mean, hard, tough)
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APASmart Define. (2015). unrelenting thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/unrelenting/thesaurus/synonyms
ChicagoSmart Define. 2015. "unrelenting thesaurus" https://smartdefine.org/unrelenting/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, unrelenting thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/unrelenting/thesaurus/synonyms>.
MLASmart Define. "unrelenting thesaurus" 3 August 2015. Web. 1 October 2026. <https://smartdefine.org/unrelenting/thesaurus/synonyms>