WordNet (r) 3.0 (2006):

intercom
    n 1: a communication system linking different rooms within a
         building or ship etc [syn: intercommunication system,
         intercom]

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "intercom":
   Gramophone, PA, PA system, Victrola, audio sound system,
   audiophile, binaural system, bitch box, bullhorn, cartridge,
   ceramic pickup, changer, crystal pickup,
   derived four-channel system, discrete four-channel system,
   four-channel stereo system, hi-fi, hi-fi fan, high-fidelity,
   intercommunication system, jukebox, magnetic pickup,
   monaural system, mono, needle, nickelodeon, phonograph,
   photoelectric pickup, pickup, public-address system,
   quadraphonic sound system, radio-phonograph combination,
   record changer, record player, sound reproduction system,
   sound truck, squawk box, stereo, stylus, system, tape deck,
   tape recorder, tone arm, transcription turntable, turntable



The Free On-line Dictionary of Computing (30 December 2018):

INTERCOM

    The assembly language for the G-15.

   Versions: INTERCOM 101, INTERCOM 1000.

   [Listed in CACM 2(5):16, May 1959].

   (1997-07-23)