antivenin vs antitoxin

antivenin and antitoxin both are nouns.

Word	Noun	Adjective	Verb	Adverb
antivenin	Yes	No	No	No
antitoxin	Yes	No	No	No

As nouns, antitoxin is a hypernym of antivenin; that is, antitoxin is a word with a broader meaning than antivenin:

antivenin: an antitoxin that counteracts the effects of venom from the bite of a snake or insect or other animal
antitoxin: an antibody that can neutralize a specific toxin

antivenin (noun)	antitoxin (noun)
an antitoxin that counteracts the effects of venom from the bite of a snake or insect or other animal	an antibody that can neutralize a specific toxin