slaughterhouse vs butchery

slaughterhouse and butchery both are nouns.

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

As nouns, slaughterhouse and butchery are synonyms defined as:

Other synonyms of slaughterhouse include abattoir, shambles.

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