jurywoman vs adult female

jurywoman and adult female both are nouns.

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

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

Other hypernyms of jurywoman include juror, woman.

jurywoman (noun)	adult female (noun)
a female who serves (or waits to be called to serve) on a jury	an adult female person (as opposed to a man)