family Fabaceae vs subfamily Caesalpinioideae

family Fabaceae and subfamily Caesalpinioideae both are nouns.

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

family Fabaceae (noun)	subfamily 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