Synonyms to underbelly

abdomen, abomasum, anus, appendix, bay window, beerbelly, belly, blind gut, bowels, brain, breadbasket, cecum, colon, corporation, craw, crop, diaphragm, duodenum, embonpoint, endocardium, entrails, first stomach, foregut, giblets, gizzard, gullet, gut, guts, heart, hindgut, honeycomb stomach, innards, inner mechanism, insides, internals, intestine, inwards, jejunum, kidney, kishkes, large intestine, liver, liver and lights, lung, manyplies, maw, middle, midgut, midriff, midsection, omasum, paunch, perineum, pod, pot, potbelly, potgut, psalterium, pump, pusgut, pylorus, rectum, rennet bag, reticulum, rumen, second stomach, small intestine, spare tire, spleen, stomach, swagbelly, third stomach, ticker, tripes, tum-tum, tummy, venter, ventripotence, vermiform appendix, viscera, vitals, works, fundament, backside, base, basement, basis, beam, bearing wall, bed, bedding, bedrock, behind, bottom, bottom side, breech, buttocks, derriere, downside, floor, flooring, fond, footing, foundation, fundamental, ground, grounds, groundwork, hardpan, lower side, lowest layer, lowest level, nether side, nethermost level