WordNet (r) 3.0 (2006):

Kraut
    n 1: offensive term for a person of German descent [syn:
         Kraut, Krauthead, Boche, Jerry, Hun]

Moby Thesaurus II by Grady Ward, 1.0:

54 Moby Thesaurus words for "Kraut":
   Anzac, Aussie, Boche, Canuck, Chink, Fritz, GI, Guinea, Heinie,
   Hun, Hunk, Hunkie, Irish potato, Jerry, Johnny, Krauthead, Mick,
   Mickey, Paddy, Tommy, Tommy Atkins, Yank, askari, aubergine, beans,
   cabbage, dago, digger, doughboy, eggplant, frog, greaseball,
   greaser, greens, jock, legumes, limey, love apple, mad apple,
   pieplant, poilu, potato, potherbs, produce, redcoat, rhubarb,
   sepoy, spud, swaddy, tater, tomato, vegetables, wetback,
   white potato