Synonyms of fierce

1 Syllable

ter, cruel, gruff, keen, grim, wild

2 Syllables

crueler, feral, fiery, wilder, furious, angry, keener, angrier, lawless, scrappy, gruffer, angriest, hang-tough, grueling, ruthless, heated, violent, nastier, piercing, keenest, raver, cruelest, hard-time, scrappier, wildest, ardent, grimmer, feller, gruffest, grimmest, nasty, nastiest

3 Syllables

recusant, tormenting, tumultuous, dog-eat-dog, barbaric, ireful, unpleasant, vehement, impetuous, relentless, hotblooded, beastlike, truculent, turbulent, lupine, coldblooded, tameless, heightened, terrific, merciless, ferine, hard-shelled, ferocious, ruffianly, inhuman, volcanic, tigerish, appetent, savage, untamed, rumbustious, intense

4 Syllables

belligerent, impassioned, excitable, iron-fisted, anarchistic, atavistic, highpowered, high-pressure, remorseless, lovey-dovey, unpeaceful, inhumane, all-consuming, formidable, unrepenting, ironfisted, agonizing, piratical, iron-willed

5 Syllables

preliterate, nonliterate

6 Syllables

undomesticated