coffee vs drinkable

coffee and drinkable both are nouns.

Word	Noun	Adjective	Verb	Adverb
coffee	Yes	No	No	No
drinkable	Yes	Yes	No	No

As nouns, drinkable is a hypernym of coffee; that is, drinkable is a word with a broader meaning than coffee:

Other hypernyms of coffee include beverage, drink, potable.

coffee (noun)	drinkable (noun)
a medium brown to dark-brown color	any liquid suitable for drinking
a beverage consisting of an infusion of ground coffee beans
a seed of the coffee tree; ground to make coffee
any of several small trees and shrubs native to the tropical Old World yielding coffee beans

coffee (adjective)	drinkable (adjective)
	suitable for drinking