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: construction 
Words: hoist, crane, excavator, egret, derrick
egret

Category: food 
Words: meat, weenie, loyalty, frank, vittles
loyalty

Category: moral characteristic 
Words: medium, fair, alright, decent, loyal

medium