compel vs compulsion

compel is not a noun while compulsion is a noun.

Word	Noun	Adjective	Verb	Adverb
compel	No	No	Yes	No
compulsion	Yes	No	No	No

compel (noun)	compulsion (noun)
	using force to cause something to occur
	an irrational motive for performing trivial or repetitive actions, even against your will
	an urge to do or say something that might be better left undone or unsaid

compel (verb)	compulsion (verb)
force somebody to do something
necessitate or exact