/ Thesaurus / U Synonyms of unsuccessfully Find synonyms for: Adverb1. unsuccessfullyusage: without success; "she tried unsuccessfully to persuade him to buy a new car"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language