Betulaceae vs family Betulaceae

Betulaceae and family Betulaceae both are nouns.

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

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

Betulaceae and family Betulaceae: monoecious trees and shrubs (including the genera Betula and Alnus and Carpinus and Corylus and Ostrya and Ostryopsis)

Other synonyms of Betulaceae include birch family.

Betulaceae (noun)	family Betulaceae (noun)
monoecious trees and shrubs (including the genera Betula and Alnus and Carpinus and Corylus and Ostrya and Ostryopsis)	monoecious trees and shrubs (including the genera Betula and Alnus and Carpinus and Corylus and Ostrya and Ostryopsis)