Find the odd-one out

Explanation: In the given question, the word spectre, apparition and phantom refers to a ghost or an unpleasant non-human structure. Whereas, The word Hoodlum is used for a person engaged in criminal and illegal activities. Thus, The word C: hoodlum is the odd one out.

Final Answer: The word C: hoodlum is an odd one out of the other options.