Breadcrumb Home > Thesaurus > W Synonyms of workhorse Find synonyms for: Noun1. workhorse, machineusage: machine that performs dependably under heavy use; "the IBM main frame computers have been the workhorse of the business world"2. workhorse, horse, Equus caballususage: a horse used for plowing and hauling and other heavy laborWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of workhorse (Dictionary) ✖ Related Content Daily Word Quiz: taradiddle Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language