carnage vs butchery

carnage and butchery both are nouns.

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

As nouns, carnage and butchery are synonyms defined as:

Other synonyms of carnage include mass murder, massacre, slaughter.

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