/ Thesaurus / A Synonyms of auxiliary engine Find synonyms for: Noun1. auxiliary engine, donkey engine, engineusage: (nautical) a small engine (as one used on board ships to operate a windlass)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: kiln Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language