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: personal characteristic 
Words: cool, calm, warm, persistent, level
warm

Category: animal 
Words: soar, cockroach, walk, fly, run
soar

Category: type of sandwich 
Words: club, doorstep, blt, group, dagwood

group