I want to say a word 'compellance' or 'compelation', but I don't know what the correct word is.
closed as not a real question by MetaEd, tchrist♦, Kristina Lopez, Hellion, cornbread ninja 麵包忍者 Mar 15 '13 at 1:34
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The simplest noun form of compel is compulsion. It is most commonly associated with psychological drives.
Compeller: a person or a reason behind the force or drive. "Father was a compeller, a man who would not be disobeyed." Keeps the Latin root of com (with) + pellere (to drive or force) but retains the reason behind the action.