/ Thesaurus / L Synonyms of light unit Find synonyms for: Noun1. light unit, electromagnetic unit, emuusage: a measure of the visible electromagnetic radiationWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: dormant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language