/ Thesaurus / G Synonyms of gasterosteus aculeatus Find synonyms for: Noun1. three-spined stickleback, Gasterosteus aculeatus, stickleback, pricklebackusage: of rivers and coastal regionsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language