/ Thesaurus / F Synonyms of fourth stomach Find synonyms for: Noun1. abomasum, fourth stomach, stomach, tummy, tum, breadbasketusage: the fourth compartment of the stomach of a ruminant; the one where digestion takes placeWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: grimace Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language