Breadcrumb Home > Thesaurus > H Cite Synonyms of heat energy Find synonyms for: Noun1. heat, heat energy, energy, free energyusage: a form of energy that is transferred by a difference in temperatureWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. TrendingHere are the facts and trivia that people are buzzing about. January 2021 Current Events: US News The Holocaust (1933–1945) Chinese New Year History, Meaning, and Celebrations Noble Titles and Ranks in a Monarchy The 5 Best Air Purifiers of 2020 Inaugural Trivia Related Content Daily Word Quiz: jerrybuilt Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language