chorus girl vs terpsichorean

chorus girl and terpsichorean both are nouns.

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

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

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

chorus girl (noun)	terpsichorean (noun)
a woman who dances in a chorus line	a performer who dances professionally

chorus girl (adjective)	terpsichorean (adjective)
	of or relating to dancing