sparkling water vs soda water

sparkling water and soda water both are nouns.

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

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

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

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

sparkling water (noun)	soda water (noun)
effervescent beverage artificially charged with carbon dioxide	effervescent beverage artificially charged with carbon dioxide
	a sweet drink containing carbonated water and flavoring