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: elements 
Words: fire, retire, ice, air, earth

SOLUTION: retire

PROBLEM: Category: animal 
Words: stingray, horse, iguana, wrestle, fish

SOLUTION: wrestle

PROBLEM: Category: weather 
Words: clime, deal, fair, honorable, tangle

SOLUTION:
honorable