bad, baleful, baneful, corroding, corrosive, corrupting, corruptive, counterproductive, deadly, deleterious, detrimental, disadvantageous, disserviceable, distressing, eroding, erosive, evil, harmful, hurtful, injurious, lethal, malefic, malevolent, malign, malignant, mischievous, noisome, noxious, ominous, pernicious, poisonous, prejudicial, scatheful, toxic, venenate, veneniferous, venenous, venomous, vicious, virulent