145 entries under cruel topic. ×

11
pitiless(adjective, animal, mean, hard, tough)
9
obstinate(adjective, mean, hard, determined)
8
firm(adjective, mean, strong, hard, tough)
8
inhuman(adjective, animal, mean, hard, tough)
8
mortal(adjective, mean, severe, harsh)
8
vindictive(adjective, mean, hard, tough, severe)
7
determined(adjective, strong, hard, tough, harsh)
7
dogged(adjective, appearance, mean, hard, tough)
7
unfeeling(adjective, animal, mean, hard, severe)
6
revengeful(adjective, mean, evil, nasty, harsh)
6
savage(adjective, animal, mean, hard, tough)
6
severe(adjective, appearance, mean, strong, hard)
6
tough(adjective, mean, strong, hard, firm)
6
unflinching(adjective, mean, severe, harsh)
6
unmerciful(adjective, mean, hard, tough, severe)
5
ferocious(adjective, animal, mean, evil, nasty)
5
stony(adjective, mean, hard, harsh, cold)
5
unsympathetic(adjective, animal, mean, hard, severe)
5
vengeful(adjective, mean, severe, evil, nasty)
4
callous(adjective, mean, hard, severe, evil)
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APASmart Define. (2016). implacable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/implacable/thesaurus/synonyms
ChicagoSmart Define. 2016. "implacable thesaurus" https://smartdefine.org/implacable/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, implacable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/implacable/thesaurus/synonyms>.
MLASmart Define. "implacable thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/implacable/thesaurus/synonyms>