The term 'Supporting Post' can be summarized as a Stilt, which is a five-letter word. A stilt is a type of pole or post used to support a structure or object, such as a building, bridge, or even a person. Stilts are typically made of wood, metal, or plastic and are used to provide stability and strength to the structure or object they are supporting. They are also used in various activities, such as walking on stilts, circus performances, and other recreational activities.