feed grain vs feed

feed grain and feed both are nouns.

Word	Noun	Adjective	Verb	Adverb
feed grain	Yes	No	No	No
feed	Yes	No	Yes	No

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

Other hypernyms of feed grain include provender.

feed grain (noun)	feed (noun)
grain grown for cattle feed	food for domestic livestock

feed grain (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