brewage vs kvass

brewage and kvass both are nouns.

Word	Noun	Adjective	Verb	Adverb
brewage	Yes	No	No	No
kvass	Yes	No	No	No

As nouns, kvass is a hyponym of brewage; that is, kvass is a word with a more specific, narrower meaning than brewage:

brewage: drink made by steeping and boiling and fermenting rather than distilling
kvass: fermented beverage resembling beer but made from rye or barley

Other hyponyms of brewage include beer, mead, cassiri, spruce beer.

brewage (noun)	kvass (noun)
drink made by steeping and boiling and fermenting rather than distilling	fermented beverage resembling beer but made from rye or barley