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: aesthetic characteristic 
Words: trustworthy, variety, tone, ghostly, fair
trustworthy

Category: aesthetic characteristic 
Words: well, milky, variety, tone, fair
well

Category: police punishment 
Words: level, probation, prison, fine, custody

level