/ Thesaurus / I Synonyms of irenaeus Find synonyms for: Noun1. Irenaeus, Saint Irenaeus, St. Irenaeususage: Greek theologian who was bishop of Lyons and an antiheretical writer; a saint and Doctor of the Church (circa 130-200)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language