Choose the word which is different from the rest.

The answer is D. Hockey.

A discus, spear, and javelin are all thrown objects used in sports. A discus is a heavy, round plate that is thrown for distance. A spear is a long, pointed weapon that is thrown or thrust. A javelin is a long, thin spear that is thrown for distance. Hockey is a game played on ice or grass with a stick and a ball or puck.

The word “hockey” is different from the rest because it is not a thrown object. It is a game played with a stick and a ball or puck.