chocolate vs food

chocolate and food both are nouns.

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

As nouns, food is a hypernym of chocolate; that is, food is a word with a broader meaning than chocolate:

chocolate: a food made from roasted ground cacao beans
food: any solid substance (as opposed to liquid) that is used as a source of nourishment

Other hypernyms of chocolate include solid food.

chocolate (noun)	food (noun)
a medium brown to dark-brown color	any substance that can be metabolized by an animal to give energy and build tissue
a food made from roasted ground cacao beans	anything that provides mental stimulus for thinking
a beverage made from cocoa powder and milk and sugar; usually drunk hot	any solid substance (as opposed to liquid) that is used as a source of nourishment