deb vs adult female

deb and adult female both are nouns.

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

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

Other hypernyms of deb include woman.

deb (noun)	adult female (noun)
a young woman making her debut into society	an adult female person (as opposed to a man)