Cactaceae vs family Cactaceae

Cactaceae and family Cactaceae both are nouns.

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

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

Other synonyms of Cactaceae include cactus family.

Cactaceae (noun)	family Cactaceae (noun)
constituting the order Opuntiales	constituting the order Opuntiales