[1] : WordNet (r) 2.0

tummy
     n 1: slang terms for a paunch syn: pot, potbelly, bay
          window, corporation
     2: an enlarged and muscular saclike organ of the alimentary
        canal; the principal organ of digestion syn: stomach, tum,
         breadbasket
see also:
pot potbelly bay window corporation stomach tum 
breadbasket 

[2] : Moby Thesaurus II by Grady Ward, 1.0

38 moby thesaurus words for "tummy":
   abdomen, abomasum, bay window, beerbelly, belly, breadbasket, craw,
   crop, diaphragm, embonpoint, first stomach, gizzard, gullet, gut,
   honeycomb stomach, kishkes, manyplies, maw, midriff, omasum,
   paunch, pot, potbelly, potgut, psalterium, pusgut, rennet bag,
   reticulum, rumen, second stomach, spare tire, stomach, swagbelly,
   third stomach, tum-tum, underbelly, venter, ventripotence

Tummy >> T Words
Tummy, definition of term: Tummy
tummy_pag1.html