nourishment vs food

nourishment and food both are nouns.

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

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

nourishment: a source of materials to nourish the body
food: any substance that can be metabolized by an animal to give energy and build tissue

Other hypernyms of nourishment include nutrient.

nourishment (noun)	food (noun)
the act of nourishing	any substance that can be metabolized by an animal to give energy and build tissue
a source of materials to nourish the body	anything that provides mental stimulus for thinking
	any solid substance (as opposed to liquid) that is used as a source of nourishment