leg-pulling vs leg-pull

leg-pulling and leg-pull both are nouns.

Word	Noun	Adjective	Verb	Adverb
leg-pulling	Yes	No	No	No
leg-pull	Yes	No	No	No

As nouns, leg-pulling and leg-pull are synonyms defined as:

leg-pulling and leg-pull: as a joke: trying to make somebody believe something that is not true

leg-pulling (noun)	leg-pull (noun)
as a joke: trying to make somebody believe something that is not true	as a joke: trying to make somebody believe something that is not true