The term 'Truck Filler' is a job description for someone who is responsible for loading goods onto a truck. The crossword solutions for this term are LOAD, which is a four letter word. This job requires the person to be able to lift and move heavy items, as well as organize them in an efficient manner. They must also be able to secure the items so that they do not shift during transport. The Truck Filler must also be aware of safety regulations and ensure that the LOAD is properly balanced.