beech family vs family Fagaceae

beech family and family Fagaceae both are nouns.

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

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

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

Other synonyms of beech family include Fagaceae.

beech family (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