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.
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Question: Category: physical activity 
Words: drop, fall, leaves, bend, exercise

Answer: leaves


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

Answer: hoist


Question: Category: guitar part 
Words: bored, board, fret, jack, pick

Answer:
bored