Breadcrumb Home > Thesaurus > O Synonyms of open source Find synonyms for: Adjective1. open-sourceusage: of or relating to or being computer software for which the source code is freely availableWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. ✖ Related Content Daily Word Quiz: rococo Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language