The Collaborative International Dictionary of English v.0.48:

Gouge \Gouge\, n. [F. gouge. LL. gubia, guvia, gulbia, gulvia,
   gulvium; cf. Bisc. gubia bow, gubioa throat.]
   [1913 Webster]
   1. A chisel, with a hollow or semicylindrical blade, for
      scooping or cutting holes, channels, or grooves, in wood,
      stone, etc.; a similar instrument, with curved edge, for
      turning wood.
      [1913 Webster]

   2. A bookbinder's tool for blind tooling or gilding, having a
      face which forms a curve.
      [1913 Webster]

   3. An incising tool which cuts forms or blanks for gloves,
      envelopes, etc. from leather, paper, etc. --Knight.
      [1913 Webster]

   4. (Mining) Soft material lying between the wall of a vein
      and the solid vein. --Raymond.
      [1913 Webster]

   5. The act of scooping out with a gouge, or as with a gouge;
      a groove or cavity scooped out, as with a gouge.
      [1913 Webster]

   6. Imposition; cheat; fraud; also, an impostor; a cheat; a
      trickish person. [Slang, U. S.]
      [1913 Webster]

   Gouge bit, a boring bit, shaped like a gouge.
      [1913 Webster]

WordNet (r) 3.0 (2006):

gouge
    n 1: an impression in a surface (as made by a blow) [syn:
         dent, ding, gouge, nick]
    2: and edge tool with a blade like a trough for cutting channels
       or grooves
    3: the act of gouging
    v 1: force with the thumb; "gouge out his eyes" [syn: gouge,
         force out]
    2: obtain by coercion or intimidation; "They extorted money from
       the executive by threatening to reveal his past to the
       company boss"; "They squeezed money from the owner of the
       business by threatening him" [syn: extort, squeeze,
       rack, gouge, wring]
    3: make a groove in [syn: rout, gouge]

Moby Thesaurus II by Grady Ward, 1.0:

274 Moby Thesaurus words for "gouge":
   alveolation, alveolus, auger, avulse, bandage, beat, bedazzle,
   beguile of, benight, bezel, bilk, bite, blackmail, bleed,
   bleed white, blind, blind the eyes, blindfold, bore, broach, bunco,
   burn, burrow, canal, canalize, carve, chamfer, channel, chase,
   cheat, chink, chisel, chouse, chouse out of, clip, cog,
   cog the dice, con, corrugate, corrugation, countersink, cozen,
   crack, cranny, crib, crimp, cut, cut out, cutthroat, dado, darken,
   daze, dazzle, defraud, delve, dent, deprive of sight, deracinate,
   diddle, dig, dig out, dig up, dike, dim, dimple, dint, disentangle,
   ditch, do in, do out of, draw, draw out, dredge, dredge up, drill,
   drive, eclipse, empierce, engrave, engraving, eradicate, euchre,
   evolve, evulse, exact, exacting, excavate, excecate, excessive,
   excise, exorbitant, exploit, exsect, extort, extortionate, extract,
   extravagant, extricate, fancy, finagle, fix, flam, fleece,
   flimflam, flute, fluting, fob, fudge, furrow, gash, get out, glare,
   goffer, gore, gouge out, gouging, groove, grossly overpriced, grub,
   grub up, gull, gully, gyp, have, hocus, hocus-pocus, hold up, hole,
   hollow, hollow out, honeycomb, hoodwink, immoderate, impale,
   impress, impression, imprint, incise, incision, indent,
   indentation, indention, indenture, inflationary, inordinate, lance,
   lower, make blind, microgroove, milk, mine, mulct, needle, notch,
   obscure, out of bounds, out of sight, outrageous, overcharge,
   overprice, overpriced, overtax, pack the deal, penetrate,
   perforate, pick out, pierce, pigeon, pinch, pink, pit, pleat, plow,
   pluck out, pluck up, pock, pockmark, practice fraud upon,
   preposterous, prick, print, profiteer, prohibitive, pull, pull out,
   pull up, punch, puncture, quarry, rabbet, rake out, ream, ream out,
   remove, riddle, rifle, rifling, rip out, rook, root out, root up,
   ruck, run through, rut, sap, scam, scoop, scoop out, score,
   scrabble, scrape, scratch, screw, sell gold bricks, shake, shave,
   shortchange, shovel, sink, skewer, skin, skyrocketing, slit,
   snow-blind, soak, spade, spear, spike, spiraling, spit, squeeze,
   stab, stack the cards, stick, sting, streak, stria, striate,
   striation, strike blind, sulcation, sulcus, sunken part, surcharge,
   swindle, take a dive, take out, tap, tear out, thimblerig,
   throw a fight, transfix, transpierce, trench, trepan, trephine,
   trough, tunnel, unconscionable, undue, unearth, unravel,
   unreasonable, unwarranted, uproot, usurious, victimize, weed out,
   well-worn groove, withdraw, wrench, wrest, wrest out, wrinkle