acute, almighty, blistering, deep, dreadful, excruciating, exquisite, fearful, fearsome, ferocious, fierce, frightful, furious, ghastly, hard, heavy, heavy-duty, hellacious, intense, intensive, keen, profound, terrible, vehement, vicious, violent

bang-bang, blood-and-guts, convulsive, cyclonic, ferocious, fierce, furious, hammer-and-tongs, hot, knock-down, drag-out (or knock-down-and-drag-out), paroxysmal, rabid, rough, stormy, tempestuous, tumultuous, turbulent, violent, volcanic