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: ocean 
Words: current, early, water, brine, tide

SOLUTION: early

PROBLEM: Category: corporate 
Words: corporation, common, amalgamated, firm, tough

SOLUTION:
tough