The word, jackass, does not appear in the King James Bible. It appears that I am not allowed to use the word in jackass without the jack; but that word that I am not allowed to mention, appears 80 times in the Bible.
The word Christianity is the common name given to the Christian religion. This name was given after the Bible was written, so the word is not in the Bible. However, the words "Christian" and "Christ", which the name Christianity were derived from, are in the Bible