baby papa vs adult female

baby papa and adult female both are nouns.

Word	Noun	Adjective	Verb	Adverb
baby papa	Yes	No	No	No
adult female	Yes	No	No	No

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

Other hypernyms of baby papa include woman.

baby papa (noun)	adult female (noun)
the father of at least one of your children	an adult female person (as opposed to a man)