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.

Q: Category: shady activities 
Words: banned, replace, smear, chocolate cake, fudge

A: chocolate cake
****
Q: Category: moral characteristic 
Words: concise, frank, matter of fact, pork, blunt

A: pork
****
Q: Category: poker 
Words: board, deck, joker, tko, cards

A:
tko
****