donna vs adult female

donna and adult female both are nouns.

Word	Noun	Adjective	Verb	Adverb
donna	Yes	No	No	No
adult female	Yes	No	No	No

As nouns, adult female is a hypernym of donna; that is, adult female is a word with a broader meaning than donna:

Other hypernyms of donna include woman.

donna (noun)	adult female (noun)
an Italian woman of rank	an adult female person (as opposed to a man)