The word tornado is an altered form of the Spanish word tronada, which means “thunderstorm”. This in turn was taken from the Latin tonare, meaning “to thunder”. It most likely reached its present form through a combination of the Spanish tronada and tornar (“to turn”); however, this may be a folk etymology. A tornado is also commonly referred to as a “twister”, and is also sometimes referred to by the old-fashioned colloquial term cyclone. The term “cyclone” is used as a synonym for “tornado” in the often-aired 1939 film The Wizard of Oz. The term “twister” is also used in that film, along with being the title of the 1996 tornado-related film Twister.