The term TRA TRAILER is composed of two words, TRA and TRAILER. The first word, TRA, is an abbreviation for the word transport, which is a term used to describe the movement of goods from one place to another. The second word, TRAILER, refers to a vehicle that is towed behind a motor vehicle, typically used for transporting goods or materials. The crossword solutions for this term are LAH (3 letters) and LALA (4 letters). LAH stands for Light Armored Hauler, which is a type of military vehicle used for transporting personnel and equipment. LALA stands for Light Armored Logistics and Assault, which is a type of military vehicle used for transporting supplies and personnel in combat situations.