The term BOXCARS COMPONENT is composed of two words, each with three letters. The first word, BOXCARS, is a term used to describe a type of railroad freight car. These cars are typically large and rectangular in shape, and are used to transport goods over long distances. The second word, COMPONENT, refers to a part or element that makes up a larger whole. In this case, it could refer to the individual parts that make up a boxcar, such as the wheels, axles, and frame.