Rosaceae vs family Rosaceae

Rosaceae and family Rosaceae both are nouns.

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

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

Rosaceae and family Rosaceae: a large family of dicotyledonous plants of order Rosales; have alternate leaves and five-petaled flowers with numerous stamens

Other synonyms of Rosaceae include rose family.

Rosaceae (noun)	family Rosaceae (noun)
a large family of dicotyledonous plants of order Rosales; have alternate leaves and five-petaled flowers with numerous stamens	a large family of dicotyledonous plants of order Rosales; have alternate leaves and five-petaled flowers with numerous stamens