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.

Category: outdoor sport activity 
Words: fish, hike, hunting, row, dog
dog

Category: date status 
Words: delayed, current, whirlpool, do tests, up to the moment
whirlpool

Category: outdoor sport activity 
Words: kayak, trap, mice, fish, climbing

mice