/ Thesaurus / M Synonyms of mergus serrator Find synonyms for: Noun1. red-breasted merganser, Mergus serrator, merganser, fish duck, sawbill, sheldrakeusage: widely distributed merganser of America and EuropeWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: contemplate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language