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: descending, disgusted, down, miserable, emotional
descending

Category: food 
Words: blunt, entree, frank, wienerwurst, bun
blunt

Category: secretary duty 
Words: file, software, schedule, support, order office supplies

software