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: personal characteristic 
Words: cool, calm, warm, persistent, level

Answer: warm


Question: Category: emotional display 
Words: buck, identity, culture, fawn, pester

Answer: buck


Question: Category: emotional display 
Words: cub, lust, cajole, fawn, follow

Answer:
cub