111 entries under fierce topic. ×

8
unbending(adjective, hard, rough, harsh, cruel)
8
uncompromising(adjective, hard, rough, harsh, cruel)
7
atrocious(adjective, evil, nasty, harsh, rude)
7
bloody(adjective, hard, tough, harsh, violent)
7
demoniac(adjective, evil, nasty, harsh, violent)
7
mortal(adjective, mean, severe, harsh, cruel)
7
vindictive(adjective, mean, hard, tough, severe)
6
dogged(adjective, appearance, strong, harsh, terrible)
6
rough(adjective, hard, severe, harsh, rude)
6
rude(adjective, hard, severe, sharp, nasty)
6
strict(adjective, hard, rough, harsh, cruel)
6
unflinching(adjective, mean, strong, severe, harsh)
5
inflexible(adjective, hard, rough, harsh, cruel)
5
malevolent(adjective, mean, evil, nasty, harsh)
5
sanguinary(adjective, hard, tough, harsh, violent)
4
adamant(adjective, mean, hard, rough, harsh)
4
coarse(adjective, severe, rude, cruel, vicious)
4
determined(adjective, strong, harsh, cruel)
4
truculent(adjective, animal, appearance, mean, harsh)
4
unappeasable(adjective, mean, severe, harsh, cruel)
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APASmart Define. (2016). ruthless thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/ruthless/thesaurus/synonyms
ChicagoSmart Define. 2016. "ruthless thesaurus" https://smartdefine.org/ruthless/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, ruthless thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/ruthless/thesaurus/synonyms>.
MLASmart Define. "ruthless thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/ruthless/thesaurus/synonyms>