WordNet (r) 3.0 (2006):

wire service
    n 1: an agency to collects news reports for newspapers and
         distributes it electronically [syn: news agency, press
         agency, wire service, press association, news
         organization, news organisation]

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "wire service":
   TelAutography, Teletype, Teletype network, Teletyping, advice,
   broadcast journalism, closed-circuit telegraphy, code,
   duplex telegraphy, electricity, facsimile telegraph, information,
   intelligence, interrupter, journalism, key, multiplex telegraphy,
   news, news agency, news medium, news service, news ticker,
   newsiness, newsletter, newsmagazine, newspaper, newsworthiness,
   press association, quadruplex telegraphy, radio,
   railroad telegraphy, receiver, reportage, sender,
   simplex telegraphy, single-current telegraphy, sounder,
   stock ticker, submarine telegraphy, telegraph agency, telegraphics,
   telegraphy, teleprinter, teletypewriter, teletypewriting,
   television, telex, the fourth estate, the press, ticker, tidings,
   transmitter, typotelegraph, typotelegraphy, word