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: shady activities 
Words: falsification, fib, invent, fudge, cupcake

Answer: cupcake


Question: Category: weather 
Words: stormy, make the grade, sunny, texture, fair

Answer: texture


Question: Category: elements 
Words: burn, cool, combustion, fire, remove

Answer:
remove