/ Thesaurus / A Synonyms of aquatic mammal Find synonyms for: Noun1. aquatic mammal, placental, placental mammal, eutherian, eutherian mammalusage: whales and dolphins; manatees and dugongs; walruses; sealsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language