/ Thesaurus / F Synonyms of fruitlessly Find synonyms for: Adverb1. unproductively, fruitlessly, unprofitablyusage: in an unproductive mannerWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language