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: deck, tko, box, glove, sail
sail

Category: aesthetic characteristic 
Words: 70, pale, fair, light, milky
70

Category: shady activities 
Words: falsehood, wrongful, loosen, tart, fudge

tart