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: boxing terminology 
Words: apron, punch, deck, canvas, call
call

Category: shady activities 
Words: wrongful, fudge, unwarranted, fix, cake
cake

Category: type of sandwich 
Words: french toast, club, bacon, dance hall, submarine

dance hall