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.

Category: employment activity 
Words: scold, water, fire, praise, replace
water

Category: consumer product 
Words: joyful, program, activity, food, content
joyful

Category: weather 
Words: luke, fair, stormy, windy, equitable

equitable