further vs feed

further is not a noun while feed is a noun.

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

As verbs, feed is a hyponym of further; that is, feed is a word with a more specific, narrower meaning than further:

Other hyponyms of further include connive at, wink at, cultivate, foster, further, spur, help, carry, conduce, contribute, lead.

further (noun)	feed (noun)
	food for domestic livestock

further (adjective)	feed (adjective)
more distant in especially degree

further (verb)	feed (verb)
contribute to the progress or growth of	provide with fertilizers or add nutrients to
promote the growth of	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

further (adverb)	feed (adverb)
to or at a greater distance in time or space (`farther' is used more frequently than `further' in this physical sense)
to or at a greater extent or degree or a more advanced stage (`further' is used more often than `farther' in this abstract sense)
in addition or furthermore