hot chocolate vs drinking chocolate

hot chocolate and drinking chocolate both are nouns.

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

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

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

Other synonyms of hot chocolate include chocolate, cocoa.

hot chocolate (noun)	drinking chocolate (noun)
a beverage made from cocoa powder and milk and sugar; usually drunk hot	a beverage made from cocoa powder and milk and sugar; usually drunk hot