/ Thesaurus / O Synonyms of officialise Find synonyms for: Verb1. officialize, officialise, change, alter, modifyusage: make official; "We officialized our relationship"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language