chorus girl vs woman

chorus girl and woman both are nouns.

Word	Noun	Adjective	Verb	Adverb
chorus girl	Yes	No	No	No
woman	Yes	No	No	No

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

Other hypernyms of chorus girl include dancer, professional dancer, terpsichorean, adult female.

chorus girl (noun)	woman (noun)
a woman who dances in a chorus line	women as a class
	an adult female person (as opposed to a man)
	a female person who plays a significant role (wife or mistress or girlfriend) in the life of a particular man