The Collaborative International Dictionary of English v.0.48:

Gluttonous \Glut"ton*ous\, a.
   Given to gluttony; eating to excess; indulging the appetite;
   voracious; as, a gluttonous age. -- Glut"ton*ous*ly, adv.
   -- Glut"ton*ous*ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

gluttonous
    adj 1: given to excess in consumption of especially food or
           drink; "over-fed women and their gluttonous husbands"; "a
           gluttonous debauch"; "a gluttonous appetite for food and
           praise and pleasure" [ant: abstemious]

Moby Thesaurus II by Grady Ward, 1.0:

116 Moby Thesaurus words for "gluttonous":
   Apician, a bit much, abandoned, all-devouring, bibulous, bolting,
   boundless, cannibal, cannibalistic, carnivorous, commensal,
   cramming, crapulent, crapulous, dietetic, dining, eating, edacious,
   egregious, enormous, esurient, exaggerated, excessive, exorbitant,
   extravagant, extreme, fabulous, fancy, feeding, flesh-eating,
   fruitarian, gastronomic, gigantic, glutting, gluttonizing,
   gobbling, gorging, grain-eating, graminivorous, granivorous,
   grass-eating, greedy, gulping, guttling, guzzling, herbivorous,
   high, hoggish, hyperbolic, hyperphagic, hypertrophied, immoderate,
   incontinent, indulgent, inordinate, insatiable, insect-eating,
   insectivorous, intemperate, lactovegetarian, man-eating,
   meat-eating, mensal, monstrous, nourishing, nutritious, omnivorous,
   omophagous, out of bounds, out of sight, outrageous, overbig,
   overdeveloped, overgreat, overgrown, overindulgent, overindulging,
   overlarge, overmuch, overweening, pantophagous, phytivorous,
   phytophagous, piggish, plant-eating, polyphagic, postprandial,
   prandial, predacious, preprandial, prodigal, rapacious, ravening,
   ravenous, self-indulgent, steep, stiff, stuffing, swinish,
   too much, unbridled, unconscionable, unconstrained, uncontrolled,
   undisciplined, undue, unfrugal, unlimited, unmeasured,
   unreasonable, unrestrained, unthrifty, vegetable-eating,
   vegetarian, voracious, wolfing