coffee vs brown

coffee and brown both are nouns.

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

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

Other hypernyms of coffee include brownness.

coffee (noun)	brown (noun)
a medium brown to dark-brown color	an orange of low brightness and saturation
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)	brown (adjective)
	(of skin) deeply suntanned
	of a color similar to that of wood or earth

coffee (verb)	brown (verb)
	fry in a pan until it changes color
	make brown in color