/ Thesaurus / S Synonyms of sea wall Find synonyms for: Noun1. breakwater, groin, groyne, mole, bulwark, seawall, jetty, barrierusage: a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing awayWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language