Synonyms and related words :
agonizing, baneful, calamitous, cataclysmal, cataclysmic, catastrophic, consuming, consumptive, deadly, demolishing, demolitionary, depredatory, destroying, destructive, devastating, disastrous, doomful, excruciating, fatal, fateful, fratricidal, harrowing, heartbreaking, heartrending, heartsickening, heartwounding, internecine, nihilist, nihilistic, racking, ravaging, rending, ruining, ruinous, self-destructive, subversionary, subversive, suicidal, tormenting, torturous, vandalic, vandalish, vandalistic, wasteful, wasting, withering