/ Thesaurus / Q Synonyms of quinquagesima sunday Find synonyms for: Noun1. Quinquagesima, Quinquagesima Sunday, Christian holy dayusage: the Sunday before Ash Wednesday (the beginning of Lent)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language