Diesel engine is a type of internal combustion engine that is widely used in transportation, construction equipment, and power generation. It is known for its high efficiency, durability, and torque. There are several synonyms for the term diesel engine including compression-ignition engine, oil engine, Rudolf Diesel engine, and CI engine. These terms are commonly used interchangeably to refer to the same type of engine. Other related terms that are often used in combination with diesel engine include turbocharged diesel engine and common rail diesel engine. These synonyms and related terms help to describe different aspects and variations of the diesel engine, which is an important technology that continues to evolve and improve.