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

Category: bird 
Words: dump truck, tackle, crane, hoist, davit
dump truck

Category: activity 
Words: dessert, fritter, goodbye, dally, squander

dessert