goalpost 
Pole marking one end of the goal; a team scores a point when the ball is shot between the posts of the opponents’ goal.
tower 
Building that houses the scorekeeper, the announcer and a third umpire, who is in charge of settling any dispute that may arise on the field.
40 yd line 
Line from which a free hit may be made; depending on the seriousness of the foul, the free hit is made from the 30 yd, 40 yd or 60 yd line.