Oater is a term used to describe a Western film. However, there are plenty of other words that can be used as synonyms for this term. Some of the most common options include Western, cowboy movie, frontier film, and even horse opera. All of these terms refer to the same genre of film that typically involves cowboys, gunfights, and a sense of adventure in the American West. Other synonyms include spaghetti Western, range movie, and gunfighter flick. No matter which term you use, it's important to remember that oaters remain a beloved genre with a rich history and a loyal following among film fans today.