pea family vs subfamily Papilionoideae

pea family and subfamily Papilionoideae both are nouns.

Word	Noun	Adjective	Verb	Adverb
pea family	Yes	No	No	No
subfamily Papilionoideae	Yes	No	No	No

pea family (noun)	subfamily 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