/ Thesaurus / L Synonyms of long island sound Find synonyms for: Noun1. Long Island Soundusage: a sound between Long Island and ConnecticutWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language