A 'punt' is a kick of the ball by the offense to return it upfield (i.e. away from the goal which they defend). A member of the other team catches the ball, and runs with it back toward his opponents' goal: that is a 'punt return'. It was also a 'scoring return', because he was not tackled or stopped before carrying the ball all the way back to the goal that the punter was trying to protect.
Someday, New Hope, you really must tell me how you find so much time to read so catholically. Don't you work, or study in a field?