murderer vs butcher

murderer and butcher both are nouns.

Word	Noun	Adjective	Verb	Adverb
murderer	Yes	No	No	No
butcher	Yes	No	Yes	No

As nouns, butcher is a hyponym of murderer; that is, butcher is a word with a more specific, narrower meaning than murderer:

murderer: a criminal who commits homicide (who performs the unlawful premeditated killing of another human being)
butcher: a brutal indiscriminate murderer

murderer (noun)	butcher (noun)
a criminal who commits homicide (who performs the unlawful premeditated killing of another human being)	a person who slaughters or dresses meat for market
	a brutal indiscriminate murderer
	a retailer of meat
	someone who makes mistakes because of incompetence

murderer (verb)	butcher (verb)
	kill (animals) usually for food consumption