/ Thesaurus / I Synonyms of ignition key Find synonyms for: Noun1. ignition key, keyusage: a key that operates the ignition switch of an automotive engineWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language