The Collaborative International Dictionary of English v.0.48:

Pommel \Pom"mel\, v. t. [imp. & p. p. Pommeledor Pommelled;
   p. pr. & vb. n. Pommeling or Pommelling.]
   To beat soundly, as with the pommel of a sword, or with
   something knoblike; hence, to beat with the fists. [Written
   also pummel.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Pummel \Pum"mel\, n. & v. t.
   Same as Pommel.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pummel
    v 1: strike, usually with the fist; "The pedestrians pummeled
         the demonstrators" [syn: pummel, pommel, biff]