/ Thesaurus / V Synonyms of vatican i Find synonyms for: Noun1. First Vatican Council, Vatican I, Vatican Councilusage: the Vatican Council in 1869-1870 that proclaimed the infallibility of the pope when speaking ex cathedraWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: loquacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language