This is the 1437th most frequent Swedish word.
fotbollen
"The football" or "the soccer ball."
Here, 'fotbollen' is used as a noun to refer to the sport of football (soccer).
Fotbollen är min favoritsport.
Football is my favorite sport.
In this instance, 'fotbollen' refers to the actual object, the ball used in the sport football.
Han tappade fotbollen och den rullade bort.
He dropped the football and it rolled away.
Here, 'fotbollen' is used to refer to the activity or game of football as a regular practice.