Harmful to the mind or morals; corrupting:
Harmful or destructive:
Causing or able to cause harm; hurtful
Characterized by, causing, or promoting the rapid onset of severe illness. Used of a disease or toxin.
Poisonous or poisoned
Of or caused by mephitis
(Computing) Causing a sudden end to the running of a program.
The definition of lethal is something very harmful or destructive, especially something that could cause death.
Malignant; spiteful; malicious
Capable of injuring or killing by poison
Find another word for toxic. In this page you can discover 27 synonyms, antonyms, idiomatic expressions, and related words for toxic, like: noxious, poisonous, nontoxic, harmful, virulent, poison, mephitic, deadly, fatal, harmless and lethal.