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: hoist, tackle, digger, excavator, crane
tackle

Category: construction 
Words: windlass, crane, hoist, digger, upraise
hoist

Category: store status 
Words: shut down, close, shut, open, touching

touching