meat cleaver vs butcher knife

meat cleaver and butcher knife both are nouns.

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

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

meat cleaver (noun)	butcher knife (noun)
a butcher's knife having a large square blade	a large sharp knife for cutting or trimming meat