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: bird 
Words: flamingo, crane, neck, ostrich, davit
davit

Category: weather 
Words: raining, cold, sunny, alright, fair
alright

Category: construction 
Words: hoist, winch, crane, digger, excavator

hoist