/ Thesaurus / O Synonyms of old catholic Find synonyms for: Noun1. Old Catholic, Christianusage: a member of the church formed in the 19th century by German Catholics who refused to accept the infallibility of the PopeWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language