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: poker 
Words: blind, chips, queen, gunwale, deck
gunwale

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

Category: emotional status 
Words: concerned, board, nervous, emotional, fret

board