common bean vs common bean

common bean and common bean both are nouns.

Word	Noun	Adjective	Verb	Adverb
common bean	Yes	No	No	No
common bean	Yes	No	No	No

common bean (noun)	common bean (noun)
any of numerous beans eaten either fresh or dried	any of numerous beans eaten either fresh or dried
the common annual twining or bushy bean plant grown for its edible seeds or pods	the common annual twining or bushy bean plant grown for its edible seeds or pods