promote vs demote

promote and demote both are verbs.

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

promote (verb)	demote (verb)
make publicity for; try to sell (a product)	assign to a lower position; reduce in rank
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