/ Thesaurus / B Synonyms of baltic sea Find synonyms for: Noun1. Baltic, Baltic Seausage: a sea in northern Europe; stronghold of the Russian navyWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language