Breadcrumb Home > Thesaurus > S Synonyms of sesquicentennial Find synonyms for: Noun1. sesquicentennial, anniversary, day of remembranceusage: the 150th anniversary (or the celebration of it)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of sesquicentennial (Dictionary) ✖ Related Content Daily Word Quiz: deracinate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language