/ Thesaurus / E Synonyms of eptesicus fuscus Find synonyms for: Noun1. big brown bat, Eptesicus fuscus, vespertilian bat, vespertilionidusage: rather large North American brown bat; widely distributedWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: jugular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language