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: aesthetic characteristic 
Words: fair, medium, size, light, loyal
loyal

Category: shady activities 
Words: cookies, wrongful, fudge, smuggled, smear
cookies

Category: guitar part 
Words: amp, emotionalities, output cord, fret, pick

emotionalities