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: consumer product 
Words: content, books, thing, program, jealous
jealous

Category: physical property 
Words: big, fat, big boned, chunky, large

big