154 entries under harsh topic. ×

6
unflinching(adjective, mean, strong, severe)
6
unsparing(adjective, mean, severe, cruel)
5
bitter(adjective, hard, severe, evil, sharp)
5
hardened(adjective, hard, tough, severe)
5
inclement(adjective, unpleasant, cruel, vicious)
5
inflexible(adjective, hard, rough, cruel)
5
malevolent(adjective, mean, evil, nasty)
5
sanguinary(adjective, hard, tough, violent)
5
virulent(adjective, evil, nasty, vicious)
4
adamant(adjective, mean, hard, rough)
4
coldhearted(adjective, mean, hard, severe)
4
determined(adjective, strong, cruel, fierce)
4
flinty(adjective, evil, nasty, cruel)
4
rancorous(adjective, mean, evil, nasty)
4
truculent(adjective, animal, appearance, mean)
4
unappeasable(adjective, mean, severe, cruel)
4
uncaring(adjective, hard, tough, severe)
4
violent(adjective, hard, rough, nasty)
3
stubborn(adjective, appearance, strong, hard, severe)
3
austere(adjective, appearance, mean, strong, hard)
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APASmart Define. (2016). ruthless thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/ruthless/thesaurus/synonyms
ChicagoSmart Define. 2016. "ruthless thesaurus" https://smartdefine.org/ruthless/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, ruthless thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/ruthless/thesaurus/synonyms>.
MLASmart Define. "ruthless thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/ruthless/thesaurus/synonyms>