Breadcrumb Home > Thesaurus > R Synonyms of rumen Find synonyms for: Noun 1. rumen, first stomach, stomach, tummy, tum, breadbasket usage: the first compartment of the stomach of a ruminant; here food is collected and returned to the mouth as cud for chewing WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of rumen (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: fatuous Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language