WordNet (r) 3.0 (2006):

ritzy
    adj 1: luxuriously elegant

Moby Thesaurus II by Grady Ward, 1.0:

69 Moby Thesaurus words for "ritzy":
   Babylonian, Corinthian, awe-inspiring, awful, barbaric, braw, chic,
   classy, clothes-conscious, cosmopolitan, dapper, dashing, deluxe,
   dressed to advantage, dressed to kill, elaborate, elegant,
   exquisite, extravagant, fancy, fine, genteel, glorious, grand,
   grandiose, imposing, impressive, jaunty, luxurious, magnificent,
   majestic, natty, neat, nifty, nobby, noble, palatial, plush, posh,
   princely, proud, recherche, sharp, sleek, smart, smug, snazzy,
   soigne, soignee, sophisticated, spiffy, splendacious, splendid,
   splendiferous, spruce, stately, style-conscious, sumptuous, superb,
   superfancy, superfine, swank, swanky, swell, tricksy, trig, trim,
   well-dressed, well-groomed