beefalo vs beef cattle

beefalo and beef cattle both are nouns.

Word	Noun	Adjective	Verb	Adverb
beefalo	Yes	No	No	No
beef cattle	Yes	No	No	No

As nouns, beef cattle is a hypernym of beefalo; that is, beef cattle is a word with a broader meaning than beefalo:

beefalo: hardy breed of cattle resulting from crossing domestic cattle with the American buffalo; yields leaner beef than conventional breeds
beef cattle: cattle that are reared for their meat

Other hypernyms of beefalo include beef.

beefalo (noun)	beef cattle (noun)
hardy breed of cattle resulting from crossing domestic cattle with the American buffalo; yields leaner beef than conventional breeds	cattle that are reared for their meat