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.

Example Input: Category: kitchenware 
Words: metal, glass, knifer, dish, cup
Example Output: metal

Example Input: Category: moral characteristic 
Words: frank, concise, bun, matter of fact, fortitude
Example Output: bun

Example Input: Category: weather 
Words: texture, clime, make the grade, fair, mild
Example Output:
texture