I still think that when it's a grey area like that they should accept more than one answer in a contest like this, or let you debate your answers at least .. I posted dictionary definitions in my answer back though, we'll see if they answer to that in four weeks
-- as per the dictionary.com definitions:
socˇcer ( P ) Pronunciation Key (skr)
n.
A
game played on a rectangular field with net goals at either end in which two teams of 11 players each try to drive a ball into the other's goal by kicking, heading, or using any part of the body except the arms and hands. The goalie is the only player who may touch or move the ball with the arms or hands
World Cup
n.
A
soccer tournament held every four years in which qualifying national teams compete to determine a world champion.
The championship awarded to the winner of this tournament.
FIFA
Fédération Internationale de Football Association (International Federation of Football Association; Zurich, Switzerland)