/ Thesaurus / R Synonyms of radiant flux Find synonyms for: Noun1. radiant flux, fluxusage: the rate of flow of radiant energy (electromagnetic waves)WordNet 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