The Collaborative International Dictionary of English v.0.48:

Scolder \Scold"er\, n.
   1. One who scolds.
      [1913 Webster]

   2. (Zool.)
      (a) The oyster catcher; -- so called from its shrill
          cries.
      (b) The old squaw. [Local U.S.]
          [1913 Webster]

WordNet (r) 3.0 (2006):

scolder
    n 1: someone (especially a woman) who annoys people by
         constantly finding fault [syn: scold, scolder, nag,
         nagger, common scold]