pet-food vs feed

pet-food and feed both are nouns.

Word	Noun	Adjective	Verb	Adverb
pet-food	Yes	No	No	No
feed	Yes	No	Yes	No

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

Other hypernyms of pet-food include provender.

pet-food (noun)	feed (noun)
food prepared for animal pets	food for domestic livestock

pet-food (verb)	feed (verb)
	provide with fertilizers or add nutrients to
	introduce continuously
	take in food; used of animals only
	give food to
	serve as food for; be the food for
	feed into; supply
	provide as food
	gratify
	profit from in an exploitatory manner
	move along, of liquids
	support or promote