sparkling water vs carbonated water

sparkling water and carbonated water both are nouns.

Word	Noun	Adjective	Verb	Adverb
sparkling water	Yes	No	No	No
carbonated water	Yes	No	No	No

As nouns, sparkling water and carbonated water are synonyms defined as:

sparkling water and carbonated water: effervescent beverage artificially charged with carbon dioxide

Other synonyms of sparkling water include club soda, seltzer, soda water.

sparkling water (noun)	carbonated water (noun)
effervescent beverage artificially charged with carbon dioxide	effervescent beverage artificially charged with carbon dioxide