Horsepower and Horsepower-hour

Horsepower noun - The ability to exert effort for the accomplishment of a task.

Horsepower-hour and horsepower are semantically related. In some cases you can replace phrase "Horsepower-hour" with "Horsepower", this terms are similar.

Horsepower-hour noun - A unit of work equal to the work done by one horsepower in one hour.

Horsepower and horsepower-hour are semantically related. Sometimes you can replace term "Horsepower" with "Horsepower-hour", this terms are similar.