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: construction 
Words: hoist, tackle, digger, excavator, crane

Answer: tackle


Question: Category: employment activity 
Words: promote, ice, retire, ban, fire

Answer: ice


Question: Category: direction 
Words: emotionalities, lower, down, ground, downward

Answer:
emotionalities