Choose the word which is different from the rest.

The answer is D. Bully.

A scoop is a tool used to lift or move things. A corner is the point where two walls or lines meet. A bunker is a defensive structure, typically underground. A bully is a person who uses strength or power to harm or intimidate others.

Scoop, corner, and bunker are all nouns that refer to physical objects or places. Bully, on the other hand, is a noun that refers to a person. Additionally, the other three words are all neutral in meaning, while bully has a negative connotation.