TASK DEFINITION: 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.
PROBLEM: Category: boxing terminology 
Words: deck, tko, box, glove, sail

SOLUTION: sail

PROBLEM: Category: window material 
Words: plastic, woodwork, glass, bowl, spyhole

SOLUTION: bowl

PROBLEM: Category: chocolate food 
Words: loosen, cupcake, tart, pudding, fudge

SOLUTION:
loosen