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: employment activity 
Words: scold, water, fire, praise, replace

Answer: water


Question: Category: outdoor sport activity 
Words: swim, wrestle, fish, canyoning, horse

Answer: horse


Question: Category: nutritional value 
Words: sugars, vitamin c, carbs, fat, skinny

Answer:
skinny