ferociously, violently, wildly, savagely, terribly, vehemently, angrily, threateningly, menacingly, frighteningly, awfully, horribly, venomously, mightily, passionately, impetuously, boldly, irresistibly, furiously, riotously, malevolently, maleficently, malignly, brutally, monstrously, cruelly, ruthlessly, forcibly, forcefully, convulsively, severely, roughly, viciously, dangerously, madly, tumultuously, raveningly, insanely, desperately, frantically, wrathfully, irately, virulently, rabidly, relentlessly, grimly, truculently, aggressively, turbulently, overpoweringly, strongly, fanatically, with rage, in a frenzy, tooth and nail*.
Antonyms mildly*, reasonably, peacefully.
