A rock drill refers to a drilling tool specifically designed for penetrating solid rocks. Synonyms for rock drill include rock breaker, rock hammer, jackhammer, and pneumatic drill. These tools are commonly used in construction, mining, and excavation projects. A rock breaker is a heavy-duty machine used for crushing rocks and excavating big boulders. A rock hammer or jackhammer is a handheld tool that uses percussive action to break up rocks. A pneumatic drill, on the other hand, uses high-pressure air to power the drill bit and has a higher drilling speed than rock hammers. Regardless of the synonym used, rock drills remain an important tool in many industries.