generator — a machine that converts one form of energy into another, especially mechanical energy into electrical energy, as a dynamo, or electrical energy into sound, as an acoustic generator.
motor — a comparatively small and powerful engine, especially an internal-combustion engine in an automobile, motorboat, or the like.
turbine — any of various machines having a rotor, usually with vanes or blades, driven by the pressure, momentum, or reactive thrust of a moving fluid, as steam, water, hot gases, or air, either occurring in the form of free jets or as a fluid passing through and entirely filling a housing around the rotor.
achiever — A high achiever is someone who is successful in their studies or their work, usually as a result of their efforts. A low achiever is someone who achieves less than those around them.
doer — a person or thing that does something, especially a person who gets things done with vigor and efficiency.
fireball — Sir Charles George Douglas, 1860–1943, Canadian poet and novelist.
pistol — a short firearm intended to be held and fired with one hand.
mover and shaker — a person who has power and influence, esp., a member of a group having power and influence
spark plug — a device designed to fit in each cylinder of a gasoline-powered internal-combustion engine and to produce the electric spark for igniting the mixture of gasoline and air.
live one — being alive; living; alive: live animals.
