WordNet (r) 3.0 (2006):

turd
    n 1: obscene terms for feces [syn: crap, dirt, shit,
         shite, poop, turd]

Moby Thesaurus II by Grady Ward, 1.0:

51 Moby Thesaurus words for "turd":
   BM, SOB, bastard, bowel movement, buffalo chips, bugger, ca-ca,
   coprolite, coprolith, cow chips, cow flops, cow pats, crap, creep,
   cur, defecation, dingleberry, dog, droppings, dung, fart, feces,
   feculence, guano, heel, hood, hooligan, jakes, jerk, louse, manure,
   meanie, mother, movement, night soil, ordure, pill, prick, rat,
   scum, sewage, sewerage, shit, shithead, shitheel, skunk, snake,
   stinkard, stinker, stool, toad