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: nutritional value 
Words: heavy, fat, protein, obese, carbs
obese

Category: aesthetic characteristic 
Words: comfortable, pretty, there, fine, classy
comfortable

Category: fried food 
Words: fritter, fried, pie, squander, sweet roll

squander