Fagaceae vs family Fagaceae

Fagaceae and family Fagaceae both are nouns.

Word	Noun	Adjective	Verb	Adverb
Fagaceae	Yes	No	No	No
family Fagaceae	Yes	No	No	No

As nouns, Fagaceae and family Fagaceae are synonyms defined as:

Fagaceae and family Fagaceae: chiefly monoecious trees and shrubs: beeches, chestnuts, oaks; genera Castanea, Castanopsis, Chrysolepis, Fagus, Lithocarpus, Nothofagus, Quercus

Other synonyms of Fagaceae include beech family.

Fagaceae (noun)	family Fagaceae (noun)
chiefly monoecious trees and shrubs: beeches, chestnuts, oaks; genera Castanea, Castanopsis, Chrysolepis, Fagus, Lithocarpus, Nothofagus, Quercus	chiefly monoecious trees and shrubs: beeches, chestnuts, oaks; genera Castanea, Castanopsis, Chrysolepis, Fagus, Lithocarpus, Nothofagus, Quercus