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: temperature 
Words: cold, cool, icy, assured, mild
assured

Category: shady activities 
Words: loosen, smuggled, chocolate, wrongful, fudge
chocolate

Category: card games 
Words: pinochle, gin, hearts, vodka, blackjack

vodka