Breadcrumb Home > Thesaurus > I Cite Synonyms of infallible Find synonyms for: Adjective1. infallible (vs. fallible), foolproof, unfailing, inerrable, inerrant, unerringusage: incapable of failure or error; "an infallible antidote"; "an infallible memory"; "the Catholic Church considers the Pope infallible"; "no doctor is infallible"WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.Definition and meaning of infallible (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. February 2021 Current Events: US News The Berlin Conference and the Partition of Africa The Implied Powers of Congress The Women's March on Versailles Keeping Your Brain Active in a COVID-19 World The Manchu Related Content Daily Word Quiz: suigeneris Analogy of the Day: Today?s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language