Synonyms and related words :
baneful, calamitous, cataclysmal, cataclysmic, catastrophic, consuming, consumptive, deadly, demolishing, demolitionary, depredatory, desolating, destroying, destructive, devastating, disastrous, doomful, fatal, fateful, fratricidal, internecine, nihilist, nihilistic, ravaging, ruining, ruinous, self-destructive, subversive, suicidal, vandalic, vandalish, vandalistic, wasteful, wasting, withering