prioress vs adult female

prioress and adult female both are nouns.

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

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

Other hypernyms of prioress include superior, woman.

prioress (noun)	adult female (noun)
the superior of a group of nuns	an adult female person (as opposed to a man)