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, stern, bun, concise, precise
bun

Category: secretary duty 
Words: organize, sort mail, fax, file, text
text

Category: outdoor sport activity 
Words: hunting, goat, wrestle, fish, raft

goat