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: water, heat, fire, empower, cool

Answer: empower


Question: Category: construction 
Words: digger, concrete pourer, crane, derrick, excavator

Answer: derrick


Question: Category: activity 
Words: squander, dunker, goodbye, blow, fritter

Answer:
dunker