The term RADIATOR PART refers to the components of a radiator, which is a device used to transfer heat from one medium to another. The four solutions for this term are HOSE (4 letters), COIL (4 letters), FIN (3 letters), and AIRVALVE (8 letters). A HOSE is a flexible tube that carries fluids from one location to another. A COIL is a series of connected loops that can be used to transfer energy or heat. Fins are thin pieces of metal that are used to increase the surface area of a radiator, allowing it to dissipate heat more quickly. An airvalve is a device that controls the flow of air into and out of a radiator.