Synonyms of the word

toxin

• n. A toxic or poisonous substance produced by the biological processes of biological organisms.

poison

• n. A substance that is harmful or lethal to a living organism.
• n. Something that harms a person or thing.
• n. (informal) A drink; liquor.
• v. (transitive) To use poison to kill or paralyse somebody.
• v. (transitive) To pollute; to cause some part of the environment to become poisonous.
• v. (transitive) To cause something to become much worse.
• v. (transitive) To cause someone to hate or to have unfair negative opinions.

toxicant

• adj. Capable of causing damage by poisoning.
• n. A toxic or poisonous substance.