/ Thesaurus / S Synonyms of swiftly Find synonyms for: Adverb1. swiftly, fleetlyusage: in a swift manner; "she moved swiftly"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language