You see the dilema, since power is a component of speed which in nature would contradict any definition of endurance I guess power endurance could occur if the goal wasn't to shorten the time it takes to complete a task but rather increasing the task done in the same time period. In exercise these terms are sometimes double edged, olympic lifts are examples of strength and power, I would simply agree with Paul and say repetitive snatches would be plain old stmina.
Stamina - capacity to maintain repetitive muscular movements
Strength - ability of a muscular unit, or combination of muscular units, to apply force
Power - ability of a muscular unit, or combination of muscular units, to apply maximum force in minimum time.