Synonyms and related words :
abdomen, action, anus, appendix, blind gut, bowels, brain, cecum, census, clockworks, colon, composition, constituents, content, contents, divisions, drive train, duodenum, elements, endocardium, entrails, foregut, gear, giblets, gizzard, guts, heart, hindgut, index, ingredients, inner mechanism, insides, internals, intestine, inventory, inwards, items, jejunum, kidney, kishkes, large intestine, list, liver, liver and lights, lung, machinery, mechanism, midgut, motion, movement, movements, part, parts, perineum, power train, pump, pylorus, rectum, servomechanism, small intestine, spleen, stomach, stuffing, ticker, tripes, vermiform appendix, viscera, vitals, watchworks, wheels, wheels within wheels, whole, workings, works