hornpipe vs dance music

hornpipe and dance music both are nouns.

Word	Noun	Adjective	Verb	Adverb
hornpipe	Yes	No	No	No
dance music	Yes	No	No	No

As nouns, dance music is a hypernym of hornpipe; that is, dance music is a word with a broader meaning than hornpipe:

hornpipe (noun)	dance music (noun)
a British solo dance performed by sailors	music to dance to
an ancient (now obsolete) single-reed woodwind; usually made of bone	a genre of popular music composed for ballroom dancing
music for dancing the hornpipe