Strength.
Power derived from the motion of a horse.
A nonmetric unit of power (symbol hp) with various definitions, for different applications. The most common of them is probably the mechanical horsepower, approximately equal to 745.7 watts.
A metric unit (symbol often PS from the German abbreviation), approximately equal to 735.5 watts.
The difference in electrostatic potential between two points in space, especially between live and neutral conductors or the earth.