Choose the word which is different from the rest.

The answer is E. Blacksmith.

A spade, knife, axe, and hammer are all tools that are used for different purposes. A spade is used for digging, a knife is used for cutting, an axe is used for chopping, and a hammer is used for pounding. A blacksmith is a person who makes and repairs metal objects, such as tools, weapons, and armor.

A blacksmith is different from the other options because it is not a tool. It is a person who uses tools to make other objects.