/ Thesaurus / H Synonyms of heat flash Find synonyms for: Noun1. heat flash, flashusage: a flash of intense heat (as released by an atomic explosion)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: cur Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language