chairman vs adult female

chairman and adult female both are nouns.

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

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

Other hypernyms of chairman include chair, chairperson, president, woman.

chairman (noun)	adult female (noun)
the male officer who presides at the meetings of an organization	an adult female person (as opposed to a man)

chairman (verb)	adult female (verb)
act or preside as chair, as of an academic department in a university