The Collaborative International Dictionary of English v.0.48:

Effigy \Ef"fi*gy\, n.; pl. Effigies. [L. effigies, fr.
   effingere to form, fashion; ex + fingere to form, shape,
   devise. See Feign.]
   The image, likeness, or representation of a person, whether a
   full figure, or a part; an imitative figure; -- commonly
   applied to sculptured likenesses, as those on monuments, or
   to those of the heads of princes on coins and medals,
   sometimes applied to portraits.
   [1913 Webster]

   To burn in effigy, or To hang in effigy, to burn or to
      hang an image or picture of a person, as a token of public
      odium.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

35 Moby Thesaurus words for "effigy":
   companion, copy, dead ringer, double, duplicate, exact likeness,
   fellow, icon, idol, image, likeness, living image, living picture,
   match, mate, miniature, mirroring, model, photograph, picture,
   portrait, reflection, resemblance, rubbing, semblance, shadow,
   similitude, simulacrum, spit and image, spitting image, trace,
   tracing, twin, very image, very picture