Synonyms of toxin
poisonPoison is a substance that harms or kills people or animals if they swallow it or absorb it.
• Poison from the weaver fish causes paralysis and swelling.
venomThe venom of a creature such as a snake or spider is the poison that it puts into your body when it bites or stings you.
• snake handlers who grow immune to snake venom
Thesaurus for toxin from the Collins English Thesaurus
any of various poisonous substances produced by microorganisms that stimulate the production of neutralizing substances (antitoxins) in the body