Breadcrumb Home > Thesaurus > O Synonyms of oceania Find synonyms for: Noun1. Oceania, Oceanicausage: a large group of islands in the south Pacific including Melanesia and Micronesia and Polynesia (and sometimes Australasia and the Malay Archipelago)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of oceania (Dictionary) ✖ Related Content Daily Word Quiz: hortatory Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language