/ Thesaurus / S Synonyms of source of illumination Find synonyms for: Noun1. source of illumination, deviceusage: any device serving as a source of visible electromagnetic radiationWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: topography Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language