SWAGE is a 5 letter word that starts with S.

1. \Swage\, v. t. & i. [imp. & p. p. {Swaged}; p. pr. & vb.
   n. {Swaging}.] [Equiv. to suage, abbrev. fr. assuage.]
   See {Assuage}. [Obs.]
   
   

2. \Swage\, n.
   A tool, variously shaped or grooved on the end or face, used
   by blacksmiths and other workers in metals, for shaping their
   work, whether sheet metal or forging, by holding the swage
   upon the work, or the work upon the swage, and striking with
   a sledge.
   
   {Swage block}, a perforated block of iron, having grooved
      sides and adapted for use in heading bolts and swaging
      objects of large size.
   
   

3. \Swage\, v. t.
   To shape by means of a swage; to fashion, as a piece of iron,
   by forcing it into a groove or mold having the required
   shape.