The term 'ROCKET PART' can be broken down into four separate crossword solutions: STAGE (5 letters), NOSE (4 letters), GYROSCOPE (9 letters), and NOSECONE (8 letters). A rocket STAGE is a section of the rocket that contains its own propulsion system and payload. The NOSE of a rocket is the pointed end of the rocket, which helps it to penetrate the atmosphere. A GYROSCOPE is a device used to measure or maintain orientation and angular velocity. Finally, a nosecone is the conical-shaped front part of a rocket, which helps to reduce drag and protect the payload from the heat of re-entry.