Synonyms of 'cataclysmic'

baneful, Black, calamitous, catastrophic, consumptive, convulsive, deadly, depredatory, destructive, devastating, dire, disastrous, fatal, fateful, grievous, insurrectionary, internecine, jerky, radical, revolutionary, revulsive, ruinous, seismic, spasmodic, spastic, subversive, suicidal, sweeping, tragic, wasteful, wasting, wreckful