Historically, names for inflatable structures, particularly in the United States, are composed of two, one syllable words. In the United States the terms that consist of two, one syllable words are popular. In Southern California, another popular term is Closed Inflatable Trampolines, or "CITs". "Bouncy Castle" or "Inflatable Castle" are used in Ireland, the UK, New Zealand and parts of Australia, and "Jumping Castles" in Arizona, Australia, Canada and South Africa. As a whole the term "moon bounce" has become a generic term for enclosed inflatable trampolines worldwide even though some still cling to the less popular hipster form "Bounce House."