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: emotional status 
Words: down, remorseful, up, emotional supports, shameful
up

Category: measurement unit 
Words: meter, inch, foot, heel, pound
heel

Category: weather 
Words: 70, endure, decent, cold, fair

decent