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.
--------
Question: Category: outdoor sport activity 
Words: wrestle, fish, iguana, hiking, hunt

Answer: iguana


Question: Category: fried food 
Words: apple, whittle, dumpling, fritter, pie

Answer: whittle


Question: Category: outdoor sport activity 
Words: dolphin, fish, canyoning, row, climbing

Answer:
dolphin