/ Thesaurus / N Synonyms of night letter Find synonyms for: Noun1. night letter, telegram, wireusage: a cheaper form of telegram sent for delivery the next dayWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language