The word "Christmas" has seven letters and there are plenty of words that can be made with those letters. For example, "mist," "mice," "emit," and "metis" are some words that can be formed from the letters in "Christmas." Additionally, the word "Christmas" itself is a combination of two other words: "Christ" and "mass." "Christ" is the name of Jesus Christ, the central figure of Christianity, and "mass" refers to a religious ceremony. Together, the two words form the word "Christmas," which is celebrated as the birth of Jesus Christ.