contribute vs promote

contribute and promote both are verbs.

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

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

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

contribute (verb)	promote (verb)
contribute to some cause	make publicity for; try to sell (a product)
bestow a quality on	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
provide	be changed for a superior chess or checker piece
be conducive to	give a promotion to or assign to a higher position
	contribute to the progress or growth of