WordNet (r) 3.0 (2006):

yogurt
    n 1: a custard-like food made from curdled milk [syn: yogurt,
         yoghurt, yoghourt]

Moby Thesaurus II by Grady Ward, 1.0:

46 Moby Thesaurus words for "yogurt":
   acid, acidulant, bread-and-butter pickle, butter, buttermilk,
   caudle, certified milk, cheese, chokecherry, condensed milk,
   cottonseed flour, crab apple, cream, dairy products, dill pickle,
   fruits, ghee, green apple, half-and-half, heavy cream, lemon,
   light cream, lime, liver, margarine, milk, nonfat dry milk, nuts,
   oleo, oleomargarine, pickle, raw milk, skim milk, sour, sour balls,
   sour cream, sour grapes, sour pickle, sourdough, soybeans,
   verjuice, vinegar, wheat germ, whey, whipping cream,
   whole wheat flour