jeune fille vs girl

jeune fille and girl both are nouns.

Word	Noun	Adjective	Verb	Adverb
jeune fille	Yes	No	No	No
girl	Yes	No	No	No

As nouns, girl is a hypernym of jeune fille; that is, girl is a word with a broader meaning than jeune fille:

Other hypernyms of jeune fille include fille, miss, missy, young lady, young woman.

jeune fille (noun)	girl (noun)
a girl or young woman who is unmarried	a young female
	a girl or young woman with whom a man is romantically involved
	a youthful female person
	a friendly informal reference to a grown woman
	a female human offspring