chauffeuse vs adult female

chauffeuse and adult female both are nouns.

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

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

Other hypernyms of chauffeuse include chauffeur, woman.

chauffeuse (noun)	adult female (noun)
a woman chauffeur	an adult female person (as opposed to a man)