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: animal 
Words: fish, iguana, canyoning, hamster, horse
Example Output: canyoning

Example Input: Category: construction 
Words: windlass, crane, hoist, digger, upraise
Example Output: hoist

Example Input: Category: emotional display 
Words: suppressed, fawn, antling, social, cute
Example Output:
antling