black music vs African-American music

black music and African-American music both are nouns.

Word	Noun	Adjective	Verb	Adverb
black music	Yes	No	No	No
African-American music	Yes	No	No	No

As nouns, black music and African-American music are synonyms defined as:

black music and African-American music: music created by African-American musicians; early forms were songs that had a melodic line and a strong rhythmic beat with repeated choruses

black music (noun)	African-American music (noun)
music created by African-American musicians; early forms were songs that had a melodic line and a strong rhythmic beat with repeated choruses	music created by African-American musicians; early forms were songs that had a melodic line and a strong rhythmic beat with repeated choruses