logrolling vs logroll

logrolling is a noun but logroll is not a noun.

Word	Noun	Adjective	Verb	Adverb
logrolling	Yes	No	No	No
logroll	No	No	Yes	No

logrolling (noun)	logroll (noun)
rotating a log rapidly in the water (as a competitive sport)
act of exchanging favors for mutual gain; especially trading of influence or votes among legislators to gain passage of certain projects

logrolling (verb)	logroll (verb)
	work toward the passage of some legislation by exchanging political favors such as trading votes