ethnic music vs folk music

ethnic music and folk music both are nouns.

Word	Noun	Adjective	Verb	Adverb
ethnic music	Yes	No	No	No
folk music	Yes	No	No	No

As nouns, ethnic music and folk music are synonyms defined as:

ethnic music and folk music: the traditional and typically anonymous music that is an expression of the life of people in a community

Other synonyms of ethnic music include folk.

ethnic music (noun)	folk music (noun)
the traditional and typically anonymous music that is an expression of the life of people in a community	the traditional and typically anonymous music that is an expression of the life of people in a community