Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.

Category: emotional status 
Words: downward, unhappy, down, shameful, disgusted
downward

Category: police punishment 
Words: hearing, firstrate, alert, custody, fine
alert

Category: aesthetic characteristic 
Words: prison, fine, attractive, hot, handsome

prison