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: accomodation 
Words: apartment, lined, house, condominium, flat

Answer: lined


Question: Category: animal 
Words: fish, iguana, canyoning, hamster, horse

Answer: canyoning


Question: Category: aesthetic characteristic 
Words: impartial, fair, medium, cool, flaxen

Answer:
impartial