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: chocolate food 
Words: smuggled, brownie, fudge, pudding, truffles
smuggled

Category: baby animals 
Words: fawn, deer, buck, kitten, cajole
cajole

Category: animal 
Words: hamster, sea turtle, tiger, climbing, fish

climbing