In the following set of words, which is different than the others?

Question

Quizplus · Accepted Answer

Accordant is an adjective used to describe something that is agreeing or compatible. It is not similar to the other words in the set since they have a negative connotation and pertain to negative feelings.
Somber is an adjective used to describe sadness or seriousness in tone. It is similar to the other words in the set (excluding 'accordant') since they pertain to negative feelings and have a negative connotation.
Melancholy is an adjective used to describe a feeling of pensive sadness, typically without obvious cause.
Distraught is an adjective used to describe incredible worry, sadness, or a feeling of being upset.
Bleak is an adjective used to describe a negatively cold or forbidding atmosphere, unlikely to result in a favorable outcome.

In the Following Set of Words, Which Is Different Than