carbonated water vs sparkling water

carbonated water and sparkling water both are nouns.

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

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

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

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

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