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: aesthetic characteristic 
Words: fair, unprejudiced, level, tone, milky
unprejudiced

Category: corporate 
Words: unyielding, firm, streamline, llc, private
unyielding

Category: aesthetic characteristic 
Words: variety, well, fair, medium, endure

endure