/ Thesaurus / H Synonyms of heat engine Find synonyms for: Noun1. heat engine, engineusage: any engine that makes use of heat to do workWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: aversion Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language