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: chocolate food 
Words: brownie, loosen, chocolate cake, fudge, molasses

Answer: loosen


Question: Category: window material 
Words: metal, handle, dish, glass, vinyl

Answer: dish


Question: Category: physical property 
Words: brittleness, area, absorption, fat, calories

Answer:
calories