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: location (proximity) 
Words: on top of, touching, finished for the day, close, right there

Answer: finished for the day


Question: Category: animal 
Words: goat, stingray, tiger, hike, fish

Answer: hike


Question: Category: window material 
Words: lead, glass, spoon, fiberglass, spyhole

Answer:
spoon