outdoorswoman vs adult female

outdoorswoman and adult female both are nouns.

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

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

Other hypernyms of outdoorswoman include outdoorsperson, woman.

outdoorswoman (noun)	adult female (noun)
a woman who spends time outdoors (e.g., hunting and fishing)	an adult female person (as opposed to a man)