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: moral characteristic 
Words: frank, concise, bun, matter of fact, fortitude
bun

Category: secretary duty 
Words: answer calls, file, correspondence, document, fax
document

Category: aesthetic characteristic 
Words: level, fine, handsome, alright, pretty

alright