THESAURUS
rumen
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, second stomach, spare tire, stomach, swagbelly, third stomach, tum-tum, tummy, underbelly, ventripotence