The Collaborative International Dictionary of English v.0.48:

Journalist \Jour"nal*ist\, n. [Cf. F. journaliste.]
   1. One who keeps a journal or diary; a diarist. [Obs.]
      --Mickle.
      [1913 Webster]

   2. One whose occupation is to write for any of the public
      news media, such as newspapers, magazines, radio,
      television, or internet; also, an editorial or other
      professional writer for a periodical.
      [1913 Webster +PJC]

WordNet (r) 3.0 (2006):

journalist
    n 1: a writer for newspapers and magazines
    2: someone who keeps a diary or journal [syn: diarist, diary
       keeper, journalist]

Moby Thesaurus II by Grady Ward, 1.0:

47 Moby Thesaurus words for "journalist":
   anchorman, broadcaster, city editor, columnist, commentator,
   copy chief, copy editor, copyman, copyreader, correspondent,
   cub reporter, diaskeuast, editor, editorial writer, feature editor,
   foreign correspondent, gazetteer, hack, interviewer, leader writer,
   leg man, managing editor, news editor, newscaster, newsman,
   newsmonger, newspaperman, newspaperwoman, newswriter,
   own correspondent, paragrapher, paragraphist, pressman, publicist,
   reader, reporter, reviser, rewrite man, rewriter, scribe, slotman,
   sob sister, special correspondent, sports editor, stringer,
   subeditor, war correspondent