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. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: inmediasres Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language