chocolate vs umber

chocolate and umber both are nouns.

Word	Noun	Adjective	Verb	Adverb
chocolate	Yes	No	No	No
umber	Yes	Yes	No	No

As nouns, chocolate and umber are synonyms defined as:

Other synonyms of chocolate include burnt umber, coffee, deep brown.

chocolate (noun)	umber (noun)
a medium brown to dark-brown color	a medium brown to dark-brown color
a food made from roasted ground cacao beans	an earth pigment
a beverage made from cocoa powder and milk and sugar; usually drunk hot

chocolate (adjective)	umber (adjective)
	of the color of any of various natural brown earth pigments