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: unprejudiced, unjust, milky, ok, fair
milky

Category: baby animals 
Words: lust, kitten, deer, bambi, fawn
lust

Category: guitar part 
Words: fret, notes, bored, board, pick

bored