/ Thesaurus / S Synonyms of sponge off Find synonyms for: Verb1. sponge down, sponge off, rubusage: clean with a sponge, by rubbingWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language