pernicious Synonyms

deadly baneful deleterious mischievous subtle ruinous hurtful injurious insidious pestilent destructive noxious wicked prejudicial miasmic poisonous pestilential unhealthful pestiferous malicious noisome nocuous carcinogenic rancorous life-threatening virulent wrackful vicious vesicant venomous unwholesome suicidal sinister unhealthy toxic nasty malignant disadvantageous detrimental adverse deathful dangerous damaging cruel cataclysmic calamitous baleful bad disastrous evil