WordNet (r) 3.0 (2006):

knockwurst
    n 1: short thick highly seasoned sausage [syn: knackwurst,
         knockwurst]

Moby Thesaurus II by Grady Ward, 1.0:

20 Moby Thesaurus words for "knockwurst":
   Vienna sausage, bangers, black pudding, blood pudding, bologna,
   braunschweiger, frank, frankfurter, gooseliver, headcheese,
   hot dog, liver sausage, liverwurst, salami, saucisse, sausage,
   weenie, wiener, wienerwurst, wienie