WordNet (r) 3.0 (2006):

communications
    n 1: the discipline that studies the principles of transmiting
         information and the methods by which it is delivered (as
         print or radio or television etc.); "communications is his
         major field of study" [syn: communications,
         communication theory]

Moby Thesaurus II by Grady Ward, 1.0:

30 Moby Thesaurus words for "communications":
   AP, Associated Press, Fleet Street, Reuters, UPI,
   United Press International, book publishing, communication theory,
   communications industry, communications medium,
   communications network, electronic communications, fourth estate,
   information theory, journalism, magazine publishing, media,
   print medium, public press, public print, publishing,
   publishing industry, radio, radiocommunication, radiotelegraphy,
   radiotelephony, telecommunication, the press, wire communication,
   wireless