demolishing vs leveling

demolishing and leveling both are nouns.

Word	Noun	Adjective	Verb	Adverb
demolishing	Yes	No	No	No
leveling	Yes	No	No	No

As nouns, demolishing and leveling are synonyms defined as:

Other synonyms of demolishing include razing, tearing down.

demolishing (noun)	leveling (noun)
complete destruction of a building	the act of making equal or uniform
	complete destruction of a building
	changing the ground level to a smooth horizontal or gently sloping surface