/ Thesaurus / V Synonyms of vanishingly Find synonyms for: Adverb1. vanishinglyusage: so as to disappear or approach zero; "errors are vanishingly rare"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