ricin vs ricin toxin

ricin and ricin toxin both are nouns.

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

As nouns, ricin and ricin toxin are synonyms defined as:

ricin and ricin toxin: a toxic protein extracted from castor beans; used as a chemical reagent; can be used as a bioweapon

ricin (noun)	ricin toxin (noun)
a toxic protein extracted from castor beans; used as a chemical reagent; can be used as a bioweapon	a toxic protein extracted from castor beans; used as a chemical reagent; can be used as a bioweapon