subfamily Caesalpinioideae vs Fabaceae

subfamily Caesalpinioideae and Fabaceae both are nouns.

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

subfamily Caesalpinioideae (noun)	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