legume family vs Papilionoideae

legume family and Papilionoideae both are nouns.

Word	Noun	Adjective	Verb	Adverb
legume family	Yes	No	No	No
Papilionoideae	Yes	No	No	No

legume family (noun)	Papilionoideae (noun)
a large family of trees, shrubs, vines, and herbs bearing bean pods; divided for convenience into the subfamilies Caesalpiniaceae, Mimosaceae, Papilionaceae	alternative name used in some classification systems for the family Papilionaceae