panelist

from WordNet (r) 3.0 (2006)

panelist
    n 1: a member of a panel [syn: {panelist}, {panellist}]

from Moby Thesaurus II by Grady Ward, 1.0

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