The Collaborative International Dictionary of English v.0.48:

Rhetorician \Rhet`o*ri"cian\, a.
   Suitable to a master of rhetoric. "With rhetorician pride."
   --Blackmore.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Rhetorician \Rhet`o*ri"cian\, n. [Cf. F. rh['e]toricien.]
   1. One well versed in the rules and principles of rhetoric.
      [1913 Webster]

            The understanding is that by which a man becomes a
            mere logician and a mere rhetorician. --F. W.
                                                  Robertson.
      [1913 Webster]

   2. A teacher of rhetoric.
      [1913 Webster]

            The ancient sophists and rhetoricians, which ever
            had young auditors, lived till they were an hundred
            years old.                            --Bacon.
      [1913 Webster]

   3. An orator; specifically, an artificial orator without
      genuine eloquence; a declaimer. --Macaulay.
      [1913 Webster]

WordNet (r) 3.0 (2006):

rhetorician
    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:

26 Moby Thesaurus words for "rhetorician":
   Cicero, Demosthenes, Gongorist, Marinist, William Jennings Bryan,
   Winston Churchill, elocutionist, euphuist, fine writer, mannerist,
   master of style, orator, pedant, phrasemaker, phraseman,
   phrasemonger, platform orator, public speaker, rhetor,
   soapbox orator, soapboxer, spellbinder, stump orator, stylist,
   teacher of rhetoric, wordspinner