ricin toxin vs toxin

ricin toxin and toxin both are nouns.

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

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

ricin toxin: 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 toxin include albumen, albumin.

ricin toxin (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