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: type of sandwich 
Words: submarine, burger, bar, lettuce, club
bar

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

Category: emotional status 
Words: remorseful, kind, right, down, shameful

right