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: crane, concrete pourer, goose, hoist, duck
concrete pourer

Category: police punishment 
Words: prime, fine, jail, suspension, well
well

Category: guitar part 
Words: strap lock, truss rod, fret, output cord, sad

sad