/ Thesaurus / O Synonyms of odobenus rosmarus Find synonyms for: Noun1. Atlantic walrus, Odobenus rosmarus, walrus, seahorse, sea horseusage: a walrus of northern Atlantic and Arctic watersWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: diaphanous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language