/ Thesaurus / O Synonyms of o'hara Find synonyms for: Noun1. O'Hara, John Henry O'Harausage: United States writer (1905-1970)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language