newspaperwoman vs adult female

newspaperwoman and adult female both are nouns.

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

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

newspaperwoman: a female journalist employed to provide news stories for newspapers or broadcast media
adult female: an adult female person (as opposed to a man)

Other hypernyms of newspaperwoman include correspondent, newswriter, woman.

newspaperwoman (noun)	adult female (noun)
a female journalist employed to provide news stories for newspapers or broadcast media	an adult female person (as opposed to a man)