/ Thesaurus / E Synonyms of electrical relay Find synonyms for: Noun1. relay, electrical relay, electrical deviceusage: electrical device such that current flowing through it in one circuit can switch on and off a current in a second circuitWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language