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: direction 
Words: remorseful, south, descending, downward, down

Answer: remorseful


Question: Category: animal 
Words: bus, leap, spider, run, fly

Answer: bus


Question: Category: bird 
Words: goose, sandpiper, hoist, davit, crane

Answer:
davit