THESAURUS
informant
adviser, announcer, annunciator, attestant, attestator, attester, authority, bystander, channel, cojuror, communicant, communicator, compurgator, deponent, earwitness, enlightener, examinant, examinate, examinee, expert witness, eyewitness, gossipmonger, grapevine, information center, information medium, informer, interviewee, monitor, mouthpiece, newsmonger, notifier, passerby, press, public relations officer, publisher, questionee, quizzee, radio, reporter, source, spectator, spokesman, subject, swearer, television, teller, testifier, tipster, tout, voucher, witness
ROGET THESAURUS
informant
Information
N
information, enlightenment, acquaintance, knowledge, publicity, data, communication, intimation, notice, notification, enunciation, annunciation, announcement, communiqu_e, representation, round robin, presentment, case, estimate, specification, report, advice, monition, news, return, account, statement, mention, acquainting, instruction, outpouring, intercommunication, communicativeness,
informant, authority, teller, intelligencer, reporter, exponent, mouthpiece, informer, eavesdropper, delator, detective, sleuth, mouchard, spy, newsmonger, messenger, amicus curiae, valet de place, cicerone, pilot, guide, guidebook, handbook, vade mecum, manual, map, plan, chart, gazetteer, itinerary, hint, suggestion, innuendo, inkling, whisper, passing word, word in the ear, subaudition, cue, byplay, gesture, gentle hint, broad hint, verbum sapienti, a word to the wise, insinuation, information theory, bit, byte, word, doubleword, quad word, paragraph, segment, magnetic media, paper medium, optical media, random access memory, RAM, read-only memory, ROM, write once read mostly memory, WORM, informed, communique, reported, published, expressive, explicit plain spoken, (artless), nuncupative, nuncupatory, declaratory, expository, enunciative, communicative, communicatory, from information received, a little bird told me, I heard it through the grapevine.