brewage vs beer

brewage and beer both are nouns.

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

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

brewage: drink made by steeping and boiling and fermenting rather than distilling
beer: a general name for alcoholic beverages made by fermenting a cereal (or mixture of cereals) flavored with hops

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

brewage (noun)	beer (noun)
drink made by steeping and boiling and fermenting rather than distilling	a general name for alcoholic beverages made by fermenting a cereal (or mixture of cereals) flavored with hops