butcher knife vs knife

butcher knife and knife both are nouns.

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

As nouns, knife is a hypernym of butcher knife; that is, knife is a word with a broader meaning than butcher knife:

butcher knife: a large sharp knife for cutting or trimming meat
knife: edge tool used as a cutting instrument; has a pointed blade with a sharp edge and a handle

butcher knife (noun)	knife (noun)
a large sharp knife for cutting or trimming meat	edge tool used as a cutting instrument; has a pointed blade with a sharp edge and a handle
	a weapon with a handle and blade with a sharp point
	any long thin projection that is transient

butcher knife (verb)	knife (verb)
	use a knife on