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.
--------
Question: Category: kitchenware 
Words: metal, glass, knifer, dish, cup

Answer: metal


Question: Category: social gathering 
Words: club, group, meeting, grilled cheese, convention

Answer: grilled cheese


Question: Category: emotional display 
Words: fawn, kid, expression, flatter, pester

Answer:
kid