/ Thesaurus / T Synonyms of telegraph key Find synonyms for: Noun1. telegraph key, keyusage: key consisting of a lever that sends a telegraph signal when it is depressed and the circuit is closedWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: malady Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language