champagne vs sparkling wine

champagne and sparkling wine both are nouns.

Word	Noun	Adjective	Verb	Adverb
champagne	Yes	No	No	No
sparkling wine	Yes	No	No	No

As nouns, sparkling wine is a hypernym of champagne; that is, sparkling wine is a word with a broader meaning than champagne:

champagne: a white sparkling wine either produced in Champagne or resembling that produced there
sparkling wine: effervescent wine

champagne (noun)	sparkling wine (noun)
a white sparkling wine either produced in Champagne or resembling that produced there	effervescent wine