I'll give it a crack,

cast is how far the bow will shoot the arrow horizontally.

Stacking is how quickly the draw weight goes up, usually towards the end of the draw. basically you start out and it draws easy and smooth, then about halfway or so, the amount of weight you pull or seem to pull goes up dramatically.

Usually the bow design determines smoothness and hand shock, some straight limbed Hill style bows have hand shock and some don't. the reflex/deflex bow usually have smooth draws and no hand shock.