Winglets, also known as wing tips, are aircraft components that help reduce drag and improve fuel efficiency. However, there are other terms that can describe this aircraft structure. One such synonym is "fence", which is a vertical or horizontal extension at the wing's end, separating the boundary layer air from the free stream air. Another synonym is "sharklet", which is the trademarked term used by Airbus to describe their winglet design. "Airfoil tip devices" is another term used to describe winglets, referring to any device that improves the efficiency of the wingtip. Other synonyms include "wingtip extension", "wingtip device", "upturned winglet", and "blended winglet". All of these terms refer to the same technology that helps to decrease fuel consumption and increase the range of aircraft.