broad bean vs broad bean

broad bean and broad bean both are nouns.

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

broad bean (noun)	broad bean (noun)
shell beans cooked as lima beans	shell beans cooked as lima beans
a bean plant cultivated for use animal fodder	a bean plant cultivated for use animal fodder
Old World upright plant grown especially for its large flat edible seeds but also as fodder	Old World upright plant grown especially for its large flat edible seeds but also as fodder
seed of the broad-bean plant	seed of the broad-bean plant