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: window material 
Words: panel, translucent fabric, spatula, metal, glass
spatula

Category: chocolate food 
Words: brownies, falsification, fudge, rich, heavy
falsification

Category: poker 
Words: blind, deck, galley, joker, pack

galley