/ Thesaurus / J Synonyms of john xxiii Find synonyms for: Noun1. John XXIII, Angelo Guiseppe Roncalliusage: Italian pope from 1958 to 1963 who convoked the Second Vatican Council (1881-1963)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language