The term 'run-down car' refers to a vehicle that is in disrepair and no longer functioning properly. The two crossword solutions for this term are 'HEAP' (4 letters) and 'CRATE' (5 letters). HEAP is a noun meaning a large pile of something, usually of a disordered nature. CRATE is a noun meaning a large, strong box made of wood or metal, often used for shipping or storage. Both words can be used to describe a run-down car, as it is likely to be in a state of disarray and may even be stored in a CRATE.