The Collaborative International Dictionary of English v.0.48:

Speechmaker \Speech"mak`er\, n.
   One who makes speeches; one accustomed to speak in a public
   assembly.
   [1913 Webster]

WordNet (r) 3.0 (2006):

speechmaker
    n 1: a person who delivers a speech or oration [syn: orator,
         speechmaker, rhetorician, public speaker,
         speechifier]

Moby Thesaurus II by Grady Ward, 1.0:

18 Moby Thesaurus words for "speechmaker":
   debater, declaimer, demagogue, haranguer, jawsmith, panelist,
   public speaker, rabble-rouser, ranter, speaker, speecher,
   speechifier, spieler, spokesman, spokeswoman, spouter, talker,
   tub-thumper