/ Thesaurus / I Synonyms of inauguration day Find synonyms for: Noun1. Inauguration Day, January 20, dayusage: the day designated for inauguration of the United States PresidentWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language