subfamily Caesalpinioideae vs family Fabaceae

subfamily Caesalpinioideae and family Fabaceae both are nouns.

Word	Noun	Adjective	Verb	Adverb
subfamily Caesalpinioideae	Yes	No	No	No
family Fabaceae	Yes	No	No	No

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