Breadcrumb Home > Thesaurus > O Synonyms of officialize Find synonyms for: Verb 1. officialize, officialise, change, alter, modify usage: make official; "We officialized our relationship" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of officialize (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: tintinnabulation Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language