/ Thesaurus / F Synonyms of faultlessly Find synonyms for: Adverb1. faultlesslyusage: without a fault; in a faultless manner; "he solved all the problems faultlessly"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language