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: police punishment 
Words: probation, jail, arrest, fine, beautiful
beautiful

Category: corporate 
Words: corporation, firm, alignment, taut, leverage
taut

Category: police punishment 
Words: content, jail, fine, wispy, flyaway

content