flirt vs adult female

flirt and adult female both are nouns.

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

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

Other hypernyms of flirt include woman.

flirt (noun)	adult female (noun)
playful behavior intended to arouse sexual interest	an adult female person (as opposed to a man)
a seductive woman who uses her sex appeal to exploit men

flirt (verb)	adult female (verb)
talk or behave amorously, without serious intentions
behave carelessly or indifferently