The Collaborative International Dictionary of English v.0.48:

Gormandize \Gor"mand*ize\, Gourmandize \Gour"mand*ize\, v. i. &
   t. [imp. & p. p. Gormandized; p. pr. & vb. n.
   Gormandizing.] [F. gourmandise gluttony. See Gormand.]
   To eat greedily; to swallow voraciously; to feed ravenously
   or like a glutton; to make a pig of oneself. --Shak.

   Syn: gorge, ingurgitate, overindulge, glut, englut, stuff,
        engorge, overgorge, overeat, gormandize, gourmandize,
        binge, pig out, pok out, satiate, scarf out.
        [1913 Webster + WordNet 1.5]

WordNet (r) 3.0 (2006):

gormandize
    v 1: overeat or eat immodestly; make a pig of oneself; "She
         stuffed herself at the dinner"; "The kids binged on ice
         cream" [syn: gorge, ingurgitate, overindulge, glut,
         englut, stuff, engorge, overgorge, overeat,
         gormandize, gormandise, gourmandize, binge, pig
         out, satiate, scarf out]

Moby Thesaurus II by Grady Ward, 1.0:

19 Moby Thesaurus words for "gormandize":
   batten, bolt, bolt down, cram, devour, engorge, glut, gluttonize,
   gobble, gorge, gulp, gulp down, guttle, guzzle, live to eat, raven,
   stuff, wolf, wolf down