The term LOCOMOTIVE COMPARTMENT is composed of two words. The first word, 'LOCOMOTIVE, ' refers to a self-propelled vehicle used for hauling freight or passengers on a railway. The second word, 'COMPARTMENT, ' refers to a separate area within a larger space, such as a room or vehicle. The crossword solution for this term is CAB, which stands for the CAB of a LOCOMOTIVE. The CAB is the driver's COMPARTMENT of a LOCOMOTIVE, where the engineer and other crew members operate the train.