Myrtaceae vs family Myrtaceae

Myrtaceae and family Myrtaceae both are nouns.

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

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

Myrtaceae and family Myrtaceae: trees and shrubs yielding a fragrant oil

Other synonyms of Myrtaceae include myrtle family.

Myrtaceae (noun)	family Myrtaceae (noun)
trees and shrubs yielding a fragrant oil	trees and shrubs yielding a fragrant oil