The Collaborative International Dictionary of English v.0.48:

Gastronome \Gas"tro*nome\, Gastronomer \Gas*tron"o*mer\, n. [F.
   gastronome, fr. Gr. ?, ?, stomach + ? law, ? to distribute.]
   One fond of good living; an epicure. --Sir W. Scott.
   Gastronomic

WordNet (r) 3.0 (2006):

gastronome
    n 1: a person devoted to refined sensuous enjoyment (especially
         good food and drink) [syn: epicure, gourmet,
         gastronome, bon vivant, epicurean, foodie]

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "gastronome":
   Brillat-Savarin, Lucullus, aesthete, board-and-roomer, boarder,
   bon vivant, cannibal, carnivore, connoisseur, connoisseur of food,
   consumer, dilettante, diner, diner-out, eater, eater-out, epicure,
   feeder, flesh-eater, fruitarian, gastronomer, gastronomist,
   glutton, gourmand, gourmet, grain-eater, graminivore, granivore,
   herbivore, high liver, hungry mouth, lactovegetarian, luncher,
   man-eater, meat-eater, mouth, omnivore, omophagist, pantophagist,
   phytophage, picnicker, plant-eater, predacean, trencherman,
   vegetarian