1 toxin, venom, bane; miasma, mephitis:
The chemical plant was found to be releasing poisons into the atmosphere. He kills rats using poison
2 virus, bane, cancer, canker, corrupt or evil influence, pestilence, plague, blight:
The drug barons continue to spread their poison throughout the world.
3 defile, adulterate, infect, taint, pollute; contaminate, debase, pervert, vitiate, subvert, warp, envenom:
Chemicals from the nearby plant have poisoned the drinking-water. Why have you poisoned the child's mind against eating spinach?
4 murder, kill, do away with, destroy, dispatch or despatch:
Lucrezia Borgia poisoned her enemies in ingenious ways.