overact

overact
    v 1: exaggerate one's acting [syn: {overact}, {ham it up},
         {ham}, {overplay}] [ant: {underact}, {underplay}]
    

Overact \O`ver*act"\, v. t.
   1. To act or perform to excess; to exaggerate in acting; as,
      he overacted his part.
      [1913 Webster]

   2. To act upon, or influence, unduly. [Obs.]
      [1913 Webster]

            The hope of inheritance overacts them. --Milton.
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Overact \O`ver*act"\, v. i.
   To act more than is necessary; to go to excess in action.
   --B. Jonson.
   [1913 Webster]
    

64 Moby Thesaurus words for "overact":
      act a part, affect, assume, carry too far, counterfeit, declaim,
      do a bit, dramatize, exaggerate, exhaust, fake, feign,
      go overboard, go to extremes, go too far, grimace, ham, ham it up,
      histrionize, know no bounds, make out like, mug, out-herod Herod,
      overcarry, overdevelop, overdo, overdramatize, overdrive,
      overelaborate, overemphasize, overexercise, overexert, overexpend,
      overindulge, overlabor, overplay, overreact, overspend, overstrain,
      overstress, overstudy, overtask, overtax, overtrain, overuse,
      overwork, pass all bounds, play, play a part, play a scene,
      playact, pretend, protest too much, put on, put on airs, rant,
      roar, sham, simulate, spout, throw away, tug the heartstrings,
      underact, wear