C and W vs zydeco

C and W and zydeco both are nouns.

Word	Noun	Adjective	Verb	Adverb
C and W	Yes	No	No	No
zydeco	Yes	No	No	No

As nouns, zydeco is a hyponym of C and W; that is, zydeco is a word with a more specific, narrower 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
zydeco: music of southern Louisiana that combines French dance melodies with Caribbean music and blues

Other hyponyms of C and W include bluegrass, hillbilly music.

C and W (noun)	zydeco (noun)
a simple style of folk music heard mostly in the southern United States; usually played on stringed instruments	music of southern Louisiana that combines French dance melodies with Caribbean music and blues