/ Thesaurus / G Synonyms of giant water bug Find synonyms for: Noun1. giant water bug, water bugusage: large water bug with piercing and sucking mouthparts; feeds on young fishesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language