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: trip, jump, fall, equinox, exercise

Answer: equinox


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

Answer: buck


Question: Category: chocolate food 
Words: cupcake, cream, fudge, cookies, unwarranted

Answer:
unwarranted