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: physical activity 
Words: tumble, summer, fall, bend, lift
summer

Category: police punishment 
Words: flyaway, jail time, ok, arrest, fine
ok

Category: weather 
Words: endure, decent, windy, fair, 70

decent