/ Thesaurus / C Synonyms of caspian sea Find synonyms for: Noun1. Caspian, Caspian Seausage: a large saltwater lake between Iran and Russia fed by the Volga River; the largest inland body of water in the worldWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language