skiffle vs popular music genre

skiffle and popular music genre both are nouns.

Word	Noun	Adjective	Verb	Adverb
skiffle	Yes	No	No	No
popular music genre	Yes	No	No	No

As nouns, popular music genre is a hypernym of skiffle; that is, popular music genre is a word with a broader meaning than skiffle:

skiffle: a style of popular music in the 1950s; based on American folk music and played on guitars and improvised percussion instruments
popular music genre: any genre of music having wide appeal (but usually only for a short time)

Other hypernyms of skiffle include popular music.

skiffle (noun)	popular music genre (noun)
a style of popular music in the 1950s; based on American folk music and played on guitars and improvised percussion instruments	any genre of music having wide appeal (but usually only for a short time)