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: poker 
Words: level, blind, pack, draw, deck
level

Category: aesthetic characteristic 
Words: medium, just, light, ghostly, fair
just

Category: bird 
Words: hoist, crane, heron, excavator, swift

excavator