WordNet (r) 3.0 (2006):
panelist n 1: a member of a panel [syn: panelist, panellist]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