The term 'helicopter blades' is often referred to as rotors, which is a 6-letter word. Helicopter blades are the main component of a helicopter that allows it to fly. They are typically two or more blades that spin around a central hub and provide lift and thrust for the aircraft. The blades are connected to the engine and rotate at high speeds, creating a powerful force that propels the helicopter forward. The blades also help to stabilize the aircraft in flight.