/ Thesaurus / S Synonyms of sea star Find synonyms for: Noun1. starfish, sea star, echinodermusage: echinoderms characterized by five arms extending from a central diskWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language