zydeco vs C and W

zydeco and C and W both are nouns.

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

As nouns, C and W is a hypernym of zydeco; that is, C and W is a word with a broader meaning than zydeco:

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

Other hypernyms of zydeco include country and western, country music.

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