ginger beer vs potable

ginger beer and potable both are nouns.

Word	Noun	Adjective	Verb	Adverb
ginger beer	Yes	No	No	No
potable	Yes	Yes	No	No

As nouns, potable is a hypernym of ginger beer; that is, potable is a word with a broader meaning than ginger beer:

ginger beer: carbonated slightly alcoholic drink flavored with fermented ginger
potable: any liquid suitable for drinking

Other hypernyms of ginger beer include beverage, drink, drinkable.

ginger beer (noun)	potable (noun)
carbonated slightly alcoholic drink flavored with fermented ginger	any liquid suitable for drinking

ginger beer (adjective)	potable (adjective)
	suitable for drinking