Judaism
God -  Some Jews write "God" by replacing the "o" with a dash, like this: "G-d". They do this because God's name is very holy so they are not allowed to throw away a piece of paper with "God" written on it. However, if by accident "God" is written, then the paper can be disposed of in a special way and buried in a special place.  Others say that "God" is just an English word, not Hebrew, and so it is not holy.