/ Thesaurus / E Synonyms of eighty one Find synonyms for: Adjective1. eighty-one, 81, lxxxi, cardinal (vs. ordinal)usage: being one more than eightyWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language