butchery vs abattoir

butchery and abattoir both are nouns.

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

As nouns, butchery and abattoir are synonyms defined as:

Other synonyms of butchery include shambles, slaughterhouse.

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