instruction:
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.
question:
Category: elements 
Words: ice, air, fire, hire, combustion
answer:
hire


question:
Category: boxing terminology 
Words: deck, gunwale, level, tko, jab
answer:
gunwale


question:
Category: weather 
Words: clime, fair, cool, deal, windy
answer:

cool