forewoman vs adult female

forewoman and adult female both are nouns.

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

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

Other hypernyms of forewoman include supervisor, woman.

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

Other hypernyms of forewoman include foreperson, woman.

forewoman (noun)	adult female (noun)
a woman in charge of a group of workers	an adult female person (as opposed to a man)
a woman who is foreperson of a jury