Entertaiment is a generic term that is used in the entertainment industry. The term is sometimes abbreviated as entmt and is often used in headlines, television news banners, and other related media. It is not used in general prose, but in the entertainment industry, it is a popular word.
Amusing yourself is a great trait, but not at the expense of other people. It can be as simple as playing an alphabet game where you have to find the letters on roadside signs. Another amusing way to pass time is by watching a movie on the computer. While on a long plane ride, an amusing movie can keep you from getting bored.