Triplanes are a type of aircraft with three sets of wings stacked one above the other. They were commonly used in World War I as fighter planes due to their speed and maneuverability. If you are looking for synonyms for triplanes, you might consider using the term "three-winged aircraft" or "triple-deckers." Also, "triflighters," "triple-wing planes," and "three-tier airplanes" could be used interchangeably in certain contexts. Although triplanes are not used as commonly in modern aviation, they remain a fascinating piece of aviation history, and the term "triplanes" will continue to endure as a descriptor for this unique type of aircraft.