3
plucky(adjective, resolute)
3
resolute(adjective, appearance, strong, firm, terrible)
3
resolved(adjective, resolute)
3
revengeful(adjective, mean, evil, nasty, harsh)
3
rigid(adjective, severe, harsh, cruel, determined)
3
rigorous(adjective, hard, tough, harsh, unpleasant)
3
satanic(adjective, mean, hard, harsh, cold)
3
soulless(adjective, mean, hard, harsh, cold)
3
spunky(adjective, resolute)
3
staunch(adjective, resolute)
3
steadfast(adjective, resolute)
3
strong-minded(adjective, resolute)
3
strong-willed(adjective, resolute)
3
surly(adjective, mean, hard, tough, severe)
3
tenacious(adjective, resolute)
3
thick-skinned(adjective, hard, tough, severe, cruel)
3
thorough(adjective, resolute)
3
tireless(adjective, resolute)
3
unchangeable(adjective, resolute)
3
uncharitable(adjective, terrible behavior)
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APASmart Define. (2016). ruthless thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/ruthless/thesaurus/synonyms
ChicagoSmart Define. 2016. "ruthless thesaurus" https://smartdefine.org/ruthless/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, ruthless thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/ruthless/thesaurus/synonyms>.
MLASmart Define. "ruthless thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/ruthless/thesaurus/synonyms>