girl vs chick

girl and chick both are nouns.

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

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

girl (noun)	chick (noun)
a young female	young bird especially of domestic fowl
a girl or young woman with whom a man is romantically involved	informal terms for a (young) woman
a youthful female person
a friendly informal reference to a grown woman
a female human offspring