/ Thesaurus / F Synonyms of fleetness Find synonyms for: Noun1. fleetness, celerity, quickness, rapidity, rapidness, speedinessusage: rapidity of movement; "fleetness of foot"WordNet 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