SWINGE is a 6 letter word that starts with S.

1. \Swinge\ (sw[i^]nj), v. & n.
   See {Singe}. [Obs.] --Spenser.
   
   

2. \Swinge\, v. t. [imp. & p. p. {Swinged} (sw[i^]njd); p.
   pr. & vb. n. {Swingeing} (sw[i^]nj"[i^]ng).] [OE. swengen,
   AS. swengan to shake, causative of swingan. See {Swing}.]
   1. To beat soundly; to whip; to chastise; to punish.
   
            I had swinged him soundly.            --Shak.
   
            And swinges his own vices in his son. --C. Dryden.
   
   2. To move as a lash; to lash. [Obs.]
   
            Swinges the scaly horror of his folded tail.
                                                  --Milton.
   
   

3. \Swinge\, n.
   1. The sweep of anything in motion; a swinging blow; a swing.
      [Obs.] --Waller.
   
   2. Power; sway; influence. [Obs.]