A sparking plug is an essential component of an internal combustion engine. It ignites the air-fuel mixture within the engine's cylinders, causing a controlled explosion that powers the vehicle. Synonyms for a sparking plug include spark plug, ignition plug, spark igniter, and ignition coil. All of these terms refer to the same device, which consists of a ceramic insulator, a central electrode, and a ground electrode. Other related terms include distributor, rotor arm, and distributor cap, which are all part of the ignition system that delivers the electrical charge to the sparking plug. Knowing these synonyms and related terms can be useful when diagnosing and repairing issues with a vehicle's ignition system.