Railroad tracks are composed of two main parts: the crosstie and the TIE. The crosstie, also known as a sleeper, is an 8-letter term that is used to support the rails and keep them in place. The TIE, on the other hand, is a 3-letter term that is used to connect the crossties and hold them together. Crossties and ties are essential components of railroad tracks, as they provide stability and strength to the track.