Myrtaceae vs myrtle family

Myrtaceae and myrtle family both are nouns.

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

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

Other synonyms of Myrtaceae include family Myrtaceae.

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