pernicious Synonyms

deadly baneful hurtful mischievous noxious injurious destructive deleterious subtle pestilent ruinous insidious miasmatic mephitic malignant malign malicious unwholesome malevolent malefic unhealthy lethal intimidatory wicked nasty nocuous pestiferous rancorous prejudicial poisonous pestilential suicidal toxic venomous vicious virulent noisome sinister internecine insalutary dangerous damned damageable damaging cruel corrupting catchable catastrophic cataclysmic calamitous