further vs promote

further is an adjective but promote is not an adjective.

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

As verbs, further and promote are synonyms defined as:

Other synonyms of further include advance, boost, encourage.

As verbs, promote is a hypernym of further; that is, promote is a word with a broader meaning than further:

Other hypernyms of further include advance, boost, encourage, further.

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

further (verb)	promote (verb)
contribute to the progress or growth of	make publicity for; try to sell (a product)
promote the growth of	change a pawn for a better piece by advancing it to the eighth row, or change a checker piece for a more valuable piece by moving it to the row closest to your opponent
	be changed for a superior chess or checker piece
	give a promotion to or assign to a higher position
	contribute to the progress or growth of

further (adverb)	promote (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