C and W vs ethnic music

C and W and ethnic music both are nouns.

Word	Noun	Adjective	Verb	Adverb
C and W	Yes	No	No	No
ethnic music	Yes	No	No	No

As nouns, ethnic music is a hypernym of C and W; that is, ethnic music is a word with a broader meaning than C and W:

C and W: a simple style of folk music heard mostly in the southern United States; usually played on stringed instruments
ethnic music: the traditional and typically anonymous music that is an expression of the life of people in a community

Other hypernyms of C and W include folk, folk music.

C and W (noun)	ethnic music (noun)
a simple style of folk music heard mostly in the southern United States; usually played on stringed instruments	the traditional and typically anonymous music that is an expression of the life of people in a community