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: weather 
Words: 70, sunny, equitable, fair, tangle
equitable

Category: moral characteristic 
Words: unprejudiced, unjust, milky, ok, fair
milky

Category: poker 
Words: queen, deck, apron, board, check

apron