Synonyms for poison

virus, bane, toxin, infection, germ, bacteria, oil, vapor, gas; see also venom 1.

Types of poisons include: rattlesnake, copperhead, black-widow-spider, tarantula venom; poison oak, poison ivy, death angel mushroom, hemlock, foxglove, nightshade, carbon monoxide gas, cooking gas, arsenic, lead, strychnine, oxalic, sulphuric, hydrochloric, nitric, carbolic, prussic, hydrocyanic acid; cyanide, cantharides, caustic soda, lye, belladonna, curare, aconite, Paris green, lead arsenate, blue vitriol, copper sulfate, nicotine, DDT, Agent Orange, radiation, radon gas, botulin.

infect, injure, kill, murder, destroy, vitiate, corrupt, pervert, undermine, defile, harm, taint, envenom, make ill, cause violent illness.

Antonyms benefit, help*, purify.