2
dedicated(adjective, resolute)
2
deliberate(adjective, resolute)
2
depraved(adjective, evil, nasty, harsh, corrupt)
2
despicable(adjective, mean, vicious, wicked, spiteful)
2
devoted(adjective, resolute)
2
diligent(adjective, resolute)
2
distressing(adjective, harsh, unpleasant, cruel, vicious)
2
dreadful(adjective, wicked)
2
earnest(adjective, resolute)
2
evil(adjective, mean, nasty, harsh, corrupt)
2
exacting(adjective, hard, tough, severe, rough)
2
faithful(adjective, resolute)
2
foul(adjective, wicked)
2
frigid(adjective, mean, hard, harsh, cold)
2
gross(adjective, brutal)
2
hearty(adjective, resolute)
2
heinous(adjective, wicked)
2
hideous(adjective, appearance, terrible, hopeless)
2
horrid(adjective, appearance, terrible, hopeless)
2
horrifying
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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>