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: mode of transportation 
Words: bus, fly, jog, beetle, drive
beetle

Category: construction 
Words: dump truck, swift, crane, upraise, windlass
swift

Category: police punishment 
Words: custody, fine, jail time, attractive, penalty

attractive