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: boats 
Words: bridge, deck, stern, dock, suits

Answer: suits


Question: Category: moral characteristic 
Words: unprejudiced, unjust, milky, ok, fair

Answer: milky


Question: Category: geographical property 
Words: flat, horizontal, smooshed, elevation, house

Answer:
house