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: consumer product 
Words: merchandise, happy, thing, content, service

Answer: happy


Question: Category: direction 
Words: down, right, below, ground, emotionalities

Answer: emotionalities


Question: Category: animal 
Words: fish, climbing, goat, sea turtle, dog

Answer:
climbing