pea family vs Caesalpinioideae

pea family and Caesalpinioideae both are nouns.

Word	Noun	Adjective	Verb	Adverb
pea family	Yes	No	No	No
Caesalpinioideae	Yes	No	No	No

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