food product vs food

food product and food both are nouns.

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

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

food product: a substance that can be used or prepared for use as food
food: any substance that can be metabolized by an animal to give energy and build tissue

Other hypernyms of food product include nutrient.

food product (noun)	food (noun)
a substance that can be used or prepared for use as food	any substance that can be metabolized by an animal to give energy and build tissue
	anything that provides mental stimulus for thinking
	any solid substance (as opposed to liquid) that is used as a source of nourishment