Synonyms for Christmas (same or very similar meaning)
WordNet sense 1 (period extending from Dec. 24 to Jan. 6):
noel, yule, yuletide, Christmastide, ChristmastimeWordNet sense 2 (a Christian holiday celebrating the birth of Christ; a quarter day in England, Wales, and Ireland):
Xmas, Christmas DayFrom the ODE community, based on WordNetadd/edit