/ Thesaurus / Z Synonyms of zirconium dioxide Find synonyms for: Noun1. zirconium oxide, zirconia, zirconium dioxide, oxideusage: a white crystalline oxide; used in refractories and in insulation and abrasives and enamels and glazesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language