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: animal 
Words: pounce, fly, swim, walk, walk

Answer: walk


Question: Category: elements 
Words: ban, fire, combustion, ground, flame

Answer: ban


Question: Category: emotional display 
Words: cute, lust, bambi, swoon, fawn

Answer:
bambi