vanillin vs vanilla bean

vanillin and vanilla bean both are nouns.

Word	Noun	Adjective	Verb	Adverb
vanillin	Yes	No	No	No
vanilla bean	Yes	No	No	No

vanillin (noun)	vanilla bean (noun)
a crystalline compound found in vanilla beans and some balsam resins; used in perfumes and flavorings	long bean-like fruit; seeds are used as flavoring