promoter

Concise Oxford English Dictionary © 2008 Oxford University Press:
promote/prəˈməʊt/

▶verb

• 1 further the progress of; support or encourage.

  ■ publicize (a product or venture).

  ■ attempt to ensure the passing of (a private Act of Parliament).

• 2 raise to a higher position or rank.

  ■ transfer (a sports team) to a higher division of a league.

• 3 Chemistry (of an additive) increase the activity of (a catalyst).

• 4 Chess exchange (a pawn) for a more powerful piece when it reaches the opponent's end of the board.

– derivatives
promotability noun,
promotable adjective,
promoter noun,
promotive adjective.

– origin ME: from L. promot-, promovere ‘move forward’, from pro- ‘forward, onward’ + movere ‘to move’.