hot chocolate vs cocoa

hot chocolate and cocoa both are nouns.

Word	Noun	Adjective	Verb	Adverb
hot chocolate	Yes	No	No	No
cocoa	Yes	No	No	No

As nouns, hot chocolate and cocoa are synonyms defined as:

hot chocolate and cocoa: a beverage made from cocoa powder and milk and sugar; usually drunk hot

Other synonyms of hot chocolate include chocolate, drinking chocolate.

hot chocolate (noun)	cocoa (noun)
a beverage made from cocoa powder and milk and sugar; usually drunk hot	powder of ground roasted cacao beans with most of the fat removed
	a beverage made from cocoa powder and milk and sugar; usually drunk hot