Source : Webster's Revised Unabridged Dictionary (1913)

Pamphleteer \Pam`phlet*eer"\, n.
   A writer of pamphlets; a scribbler. --Dryden. Macaulay.

Pamphleteer \Pam`phlet*eer"\, v. i.
   To write or publish pamphlets.

         By pamphleteering we shall not win.      --C. Kingsley.

Source : WordNet®

pamphleteer
     n : a writer of pamphlets (usually taking a partisan stand on
         public issues)