Breadcrumb Home > Thesaurus > M Synonyms of mule Find synonyms for: Noun 1. mule, equine, equid usage: hybrid offspring of a male donkey and a female horse; usually sterile 2. mule, scuff, slipper, carpet slipper usage: a slipper that has no fitting around the heel WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of mule (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: cognoscenti Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language