Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

[EX Q]: remorseful, flat, melancholy, down, shameful
[EX A]: flat

[EX Q]: sugar, angular momentum, large, area, fat
[EX A]: sugar

[EX Q]: empower, promote, ban, ground, fire
[EX A]:
ground