/ Thesaurus / E Synonyms of electron beam Find synonyms for: Noun1. beam, ray, electron beam, electromagnetic radiation, electromagnetic wave, nonparticulate radiationusage: a group of nearly parallel lines of electromagnetic radiationWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: languid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language