Breadcrumb Home > Thesaurus > O Synonyms of oenothera Find synonyms for: Noun1. Oenothera, genus Oenothera, dicot genus, magnoliopsid genususage: chiefly North American herbs with usually nocturnal flowersWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. ✖ Related Content Daily Word Quiz: sophism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language