/ Thesaurus / E Synonyms of extension cord Find synonyms for: Noun1. extension cord, cord, electric cordusage: an electric cord used to extend the length of a power cordWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: denizen Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language