Synonyms of 'calamitous'

afflictive, awful, baneful, Black, cataclysmic, catastrophic, consumptive, deadly, depredatory, destructive, devastating, dire, disastrous, distressful, dreadful, fatal, fateful, grievous, heartbreaking, internecine, lamentable, pernicious, regrettable, ruinous, subversive, suicidal, terrible, tragic, unfortunate, wasteful, wasting, woeful, wreckful