assemblywoman vs adult female

assemblywoman and adult female both are nouns.

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

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

Other hypernyms of assemblywoman include representative, woman.

assemblywoman (noun)	adult female (noun)
a woman assemblyman	an adult female person (as opposed to a man)