ricin vs toxin

ricin and toxin both are nouns.

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

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

ricin: a toxic protein extracted from castor beans; used as a chemical reagent; can be used as a bioweapon
toxin: a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species

Other hypernyms of ricin include albumen, albumin.

ricin (noun)	toxin (noun)
a toxic protein extracted from castor beans; used as a chemical reagent; can be used as a bioweapon	a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species