/ Thesaurus / B Synonyms of beaver rat Find synonyms for: Noun1. beaver rat, water ratusage: amphibious rat of Australia and New GuineaWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language