/ Thesaurus / G Synonyms of genus notonecta Find synonyms for: Noun1. Notonecta, genus Notonecta, arthropod genususage: type genus of the Notonectidae: backswimmersWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: fortuitous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language