toxin vs toxicant

toxin and toxicant both are nouns.

Word	Noun	Adjective	Verb	Adverb
toxin	Yes	No	No	No
toxicant	Yes	Yes	No	No

As nouns, toxicant is a hypernym of toxin; that is, toxicant is a word with a broader meaning than toxin:

toxin: a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species
toxicant: any substance that causes injury or illness or death of a living organism

Other hypernyms of toxin include poison, poisonous substance.

toxin (noun)	toxicant (noun)
a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species	any substance that causes injury or illness or death of a living organism

toxin (adjective)	toxicant (adjective)
	having the qualities or effects of a poison