/ Thesaurus / E Synonyms of eccm Find synonyms for: Noun1. electronic counter-countermeasures, ECCM, electronic warfare, EWusage: electronic warfare undertaken to insure effective friendly use of the electromagnetic spectrum in spite of the enemy's use of electronic warfareWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language