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: kayak, raft, fish, canyoning, dolphin
dolphin

Category: aesthetic characteristic 
Words: ghostly, milky, windy, fair, texture
windy

Category: police punishment 
Words: ok, wispy, jail, prime, fine

ok