/ Thesaurus / N Synonyms of notonecta undulata Find synonyms for: Noun1. backswimmer, Notonecta undulata, hemipterous insect, bug, hemipteran, hemipteronusage: predaceous aquatic insect that swims on its back and may inflict painful bitesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language