adjective
violent, menacing
Synonyms: angry, animal, ape, awful, barbarous, bloodthirsty, blustery, boisterous, bold, brutal, brutish, cruel, cutthroat, dangerous, enraged, fell, feral, ferocious, fiery, flipped, frightening, furious, horrible, howling, impetuous, infuriated, intense, malevolent, malign, murderous, passionate, powerful, primitive, raging, raving, relentless, savage, stormy, strong, tempestuous, terrible, threatening, tigerish, truculent, tumultous/tumultuous, uncontrollable, untamed, vehement, venomous, vicious, wild
Antonyms: calm, gentle, kind, meek, nonviolent, peaceful, tame, tender, unthreatening