coquette vs adult female

coquette and adult female both are nouns.

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

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

Other hypernyms of coquette include woman.

coquette (noun)	adult female (noun)
a seductive woman who uses her sex appeal to exploit men	an adult female person (as opposed to a man)

coquette (verb)	adult female (verb)
talk or behave amorously, without serious intentions