Synonyms and related words :
adviser, agent, announcer, annunciator, authority, champion, channel, communicant, communicator, connection, debater, declaimer, delegate, demagogue, deputy, enlightener, expert witness, front, front man, go-between, gossipmonger, grapevine, haranguer, herald, informant, information center, information medium, informer, interagent, interceder, intercessor, intermediary, intermediate, intermediate agent, intermediator, intermedium, internuncio, intervener, interventionist, interventor, interviewee, jawsmith, mediator, medium, middleman, monitor, mouth, mouthpiece, negotiant, negotiator, negotiatress, negotiatrix, newsmonger, notifier, official spokesman, ombudsman, panelist, press, prolocutor, prolocutress, prolocutrix, prophet, protagonist, public relations officer, public speaker, publisher, rabble-rouser, radio, ranter, rapporteur, reporter, representative, source, speaker, speecher, speechifier, speechmaker, spieler, spokesperson, spokeswoman, spouter, talker, television, teller, tipster, tout, tub-thumper, voice, witness