foodstuff vs food

foodstuff and food both are nouns.

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

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

foodstuff: 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 foodstuff include nutrient.

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