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.
--------
Question: Category: police punishment 
Words: probation, jail, arrest, fine, beautiful

Answer: beautiful


Question: Category: temperature 
Words: cold, cool, icy, assured, mild

Answer: assured


Question: Category: ocean 
Words: tide, course, timely, sea, current

Answer:
timely