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: corporate 
Words: unyielding, concerted, firm, combined, united
unyielding

Category: animal 
Words: fish, waggle, fly, dangle, glide
glide

Category: type of sandwich 
Words: toast, club, community, grilled cheese, hamburger

community