/ Thesaurus / D Synonyms of december 8 Find synonyms for: Noun1. Immaculate Conception, December 8, holy day of obligationusage: Roman Catholic holy day first celebrated in 1854WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: heifer Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language