Breadcrumb Home > Thesaurus > O Synonyms of oireachtas Find synonyms for: Noun1. Oireachtas, parliamentusage: the parliament of the Irish RepublicWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of oireachtas (Dictionary) ✖ Related Content Daily Word Quiz: ultimathule Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language