Synonyms and related words :
baleful, baneful, catching, communicable, contagious, corroding, corrosive, corrupting, corruptive, counterproductive, damaging, deadly, deleterious, destructive, detrimental, disadvantageous, disserviceable, distressing, envenomed, harmful, hurtful, infectious, infective, injurious, lethal, malefic, malevolent, malign, malignant, mephitic, miasmal, miasmatic, miasmic, mischievous, noisome, noxious, ominous, pernicious, pestiferous, pestilential, poison, poisonous, prejudicial, scatheful, toxicant, toxiferous, venenate, veneniferous, venenous, venomous, vicious, virulent