paroxysmal

marked by bursts of destructive force or intense activity paroxysmal mood swings that made being around him very challenging Synonyms bang-bang, blood-and-guts, convulsive, cyclonic, explosive, ferocious, fierce, furious, hammer-and-tongs, hot, knock-down, drag-out (or knock-down-and-drag-out), violent, rabid, rough, stormy, tempestuous, tumultuous, turbulent, volcanicRelated Words barbarous, brutal, savage, vicious; antagonistic, hostile; aggressive, assertive, bellicose, belligerent, combative, contentious, gladiatorial, pugnacious, quarrelsome, truculent; combustible, volatile; agitated, frantic, frenzied, mad; cataclysmal (or cataclysmic), destructive, ruinousNear Antonyms calm, halcyon, pacific, serene, tranquil; nonbelligerent, unaggressiveAntonyms nonviolent, peaceable, peaceful