Breadcrumb Home > Thesaurus > E Synonyms of epistle Find synonyms for: Noun 1. epistle, letter, missive usage: a specially long, formal letter 2. Epistle, book usage: a book of the New Testament written in the form of a letter from an Apostle WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of epistle (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: anomie Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language