Q u o t e: I'll go with "Power", and that "Endurance" thing instead of "Defense" sounds pretty good as well.
When I think of "Endurance" as a stat, my mind goes to the amount of life. So there, to me, is too much overlap in definition between "Endurance" and "Vitality"...
I do like "Power" as an attribute name in place of "Attack".
But as for a new name for "Defense"? It's kind of hard to come up with any if terms like "Armor", "Resistance" etc. are already in use... How about "Fortitude"? but that might have the same problem as "Endurance". Maybe we should just leave "Defense" as it is for now... Not enough words I guess.