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: jealous, content, merchandise, jewelry, shop

Answer: jealous


Question: Category: poker 
Words: board, joker, deck, fold, apron

Answer: apron


Question: Category: kitchenware 
Words: knifer, knive, metal, glass, plate

Answer:
metal