/ Thesaurus / C Synonyms of covering letter Find synonyms for: Noun1. covering letter, cover letter, letter, missiveusage: a letter sent along with other documents to provide additional informationWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: devout Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language