stunt man vs adult female

stunt man and adult female both are nouns.

Word	Noun	Adjective	Verb	Adverb
stunt man	Yes	No	No	No
adult female	Yes	No	No	No

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

Other hypernyms of stunt man include double, woman.

stunt man (noun)	adult female (noun)
a male stand-in for movie stars to perform dangerous stunts	an adult female person (as opposed to a man)