toxic (adj.)

• baleful
• baneful
• catching
• communicable
• contagious
• corrosive
• corrupting
• corruptive
• counterproductive
• damaging
• deadly
• deleterious
• destructive
• detrimental
• disadvantageous
• distressing
• harmful
• hurtful
• infectious
• infective
• injurious
• lethal
• malefic
• malevolent
• malign
• malignant
• mephitic
• miasmal
• miasmic
• mischievous
• noisome
• noxious
• ominous
• pernicious
• pestiferous
• pestilential
• poisonous
• prejudicial
• toxicant
• venomous
• vicious
• virulent