Shot putters are athletes who compete in the sport of shot put, which involves throwing a heavy metal ball as far as possible. The term 'shot putters' is derived from the fact that the ball used in the event is called a shot, and the athletes who compete in the event are referred to as putters. Shot putters must have strength, speed, and accuracy in order to be successful in the event. Needles, which has seven letters, is an appropriate term for shot putters because they must have a sharp eye and precise aim in order to throw the shot accurately.