The term 'PUMP PART' refers to the various components of a pump. The crossword solutions for this term include TOE (3 letters), SOLE (4 letters), INSOLE (6 letters), INSTEP (6 letters), ROTOR (5 letters), HEEL (4 letters), and VALVE (5 letters). The TOE, SOLE, insole, instep, and HEEL are all parts of a shoe, which is used to operate a pump. The ROTOR is a rotating part of the pump that helps to move the liquid or gas through the system. Finally, the VALVE is a component of the pump that regulates the flow of the liquid or gas.