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: replace, fudge, cupcake, heavy, cream
replace

Category: corporate 
Words: solid, sustainability, streamline, firm, private
solid

Category: animal 
Words: wrestle, mice, cat, sea turtle, fish

wrestle