WordNet sense 1 (violent and lawless):

tough

WordNet sense 2 (characterized by violent and forceful activity or movement; very intense):

hot, raging

WordNet sense 3 (marked by extreme and violent energy):

ferocious, fierce, furious, savage

WordNet sense 4 (not in accordance with or determined by nature; contrary to nature):

unnatural

WordNet sense 5 ((of colors or sounds) intensely vivid or loud):

wild

WordNet sense 6 (marked by extreme intensity of emotions or convictions; inclined to react violently; fervid):

trigger-happy, vehement, tearing

WordNet sense 7 (in an extreme degree):

intense

WordNet sense 8 (characterized by violence or bloodshed):

crimson, red

WordNet sense 9 (having or covered with or accompanied by blood):

bloody