The Collaborative International Dictionary of English v.0.48:

Publicist \Pub"li*cist\, n. [Cf. F. publiciste.]
   A writer on the laws of nature and nations; one who is versed
   in the science of public right, the principles of government,
   etc.
   [1913 Webster]

         The Whig leaders, however, were much more desirous to
         get rid of Episcopacy than to prove themselves
         consummate publicists and logicians.     --Macaulay.
   [1913 Webster]
   [1913 Webster]

WordNet (r) 3.0 (2006):

publicist
    n 1: someone who publicizes [syn: publicist, publicizer,
         publiciser]

Moby Thesaurus II by Grady Ward, 1.0:

79 Moby Thesaurus words for "publicist":
   AG, DA, KC, QC, SSC, US attorney, annotator, attorney general,
   book reviewer, city editor, civilian, columnist, commentator,
   commenter, copy chief, copy editor, copyman, copyreader,
   corporation lawyer, correspondent, court-appointed lawyer,
   criminal lawyer, critic, cub reporter, defense counsel, diaskeuast,
   district attorney, editor, editorial writer, editorialist,
   expositor, expounder, feature editor, foreign correspondent,
   gazetteer, glossarist, glossographer, interviewer, journalist,
   junior counsel, law agent, leader, leader writer, leg man,
   managing editor, mouthpiece, news analyst, news editor, newsman,
   newspaperman, newspaperwoman, newswriter, own correspondent,
   paragrapher, paragraphist, pressman, private attorney,
   prosecuting attorney, prosecutor, public prosecutor, reader,
   reporter, reviewer, reviser, rewrite man, rewriter, scholiast,
   silk, silk gown, slotman, sob sister, solicitor general,
   special correspondent, special pleader, sports editor, stuff gown,
   stuff-gownsman, subeditor, war correspondent