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: location (proximity) 
Words: beside, closest, close, adjacent, shut
shut

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

Category: bird 
Words: heron, swift, davit, hummingbird, crane

davit