virago vs adult female

virago and adult female both are nouns.

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

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

Other hypernyms of virago include woman.

virago (noun)	adult female (noun)
a noisy or scolding or domineering woman	an adult female person (as opposed to a man)
a large strong and aggressive woman