/ Thesaurus / S Synonyms of sea horse Find synonyms for: Noun1. walrus, seahorse, sea horse, pinniped mammal, pinniped, pinnatipedusage: either of two large northern marine mammals having ivory tusks and tough hide over thick blubber2. seahorse, sea horse, pipefish, needlefishusage: small fish with horse-like heads bent sharply downward and curled tails; swim in upright positionWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language