I'm not sure what a better word might be than displacement. I have heard camp instructors say a foul should be called when a defender uses their hands to control an offensive player. so maybe control would be a better word. When I think of displacement, I think of a defender actually moving an offensive player out of a spot and I can think of situations that would be a handchecking foul where the offensive player did not actually get moved.
Obviously you wouldn't take away a basket if the offensive player played through the contact, but that has to do with being able to hold your whistle.
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