46 entries under fierce topic. ×

1
feral(adjective, violent, cruel, vicious)
1
implacable(adjective, appearance, violent, terrible, cruel)
1
inhuman(adjective, evil, awful, violent, wild)
1
inhumane(adjective, violent, cruel, vicious)
1
lupine(adjective, violent, cruel, vicious)
1
mean(adjective, nasty, unpleasant, awful, violent)
1
merciless(adjective, appearance, violent, terrible, cruel)
1
murderous(adjective, violent, wild, cruel, vicious)
1
pitiless(adjective, violent, cruel, vicious)
1
predatory(adjective, violent, cruel, vicious)
1
rapacious(adjective, violent, cruel, vicious)
1
ravening(adjective, violent, cruel, vicious)
1
ravenous(adjective, violent, cruel, vicious)
1
relentless(adjective, appearance, violent, terrible, cruel)
1
ruthless(adjective, appearance, violent, terrible, cruel)
1
sanguinary(adjective, violent, cruel, vicious)
1
tigerish(adjective, violent, cruel, vicious)
1
truculent(adjective, appearance, violent, terrible, cruel)
1
unmerciful(adjective, violent, cruel, vicious)
1
unrestrained(adjective, violent, cruel, vicious)
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APASmart Define. (2016). frightful thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/frightful/thesaurus/synonyms
ChicagoSmart Define. 2016. "frightful thesaurus" https://smartdefine.org/frightful/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, frightful thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/frightful/thesaurus/synonyms>.
MLASmart Define. "frightful thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/frightful/thesaurus/synonyms>