/ Thesaurus / B Synonyms of biannually Find synonyms for: Adverb1. biannuallyusage: twice a year; "we hold our big sale biannually"WordNet 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