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: windlass, crane, hoist, digger, upraise
hoist

Category: widespread 
Words: boring, common, soldier, general, average
soldier

Category: guitar part 
Words: strap lock, pick, fingerpick, fret, sad

sad