butchering vs butchery

butchering and butchery both are nouns.

Word	Noun	Adjective	Verb	Adverb
butchering	Yes	No	No	No
butchery	Yes	No	No	No

As nouns, butchering and butchery are synonyms defined as:

butchering (noun)	butchery (noun)
the business of a butcher	the business of a butcher
	the savage and excessive killing of many people
	a building where animals are butchered