ricin toxin vs ricin

ricin toxin and ricin both are nouns.

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

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

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

ricin toxin (noun)	ricin (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