girl vs gamine

girl and gamine both are nouns.

Word	Noun	Adjective	Verb	Adverb
girl	Yes	No	No	No
gamine	Yes	No	No	No

As nouns, gamine is a hyponym of girl; that is, gamine is a word with a more specific, narrower meaning than girl:

girl (noun)	gamine (noun)
a young female	a girl of impish appeal
a girl or young woman with whom a man is romantically involved	a homeless girl who roams the streets
a youthful female person
a friendly informal reference to a grown woman
a female human offspring