The word that does not belong to the group of words listed below is
coordination
<span>In the Hobbit there is once or twice the Necromancer in the Mirkwood, which is an allusion to Sauron in the Hobbits Sequel, The Lord of the Rings.</span>
Because that is what he is meant to do and he also like.
Exertion maybe?
I think it might be exertion because it seems to fit... tell me if I'm wrong.