Old World buffalo vs buffalo

Old World buffalo and buffalo both are nouns.

Word	Noun	Adjective	Verb	Adverb
Old World buffalo	Yes	No	No	No
buffalo	Yes	No	Yes	No

As nouns, Old World buffalo and buffalo are synonyms defined as:

Old World buffalo and buffalo: any of several Old World animals resembling oxen including, e.g., water buffalo, Cape buffalo

Old World buffalo (noun)	buffalo (noun)
any of several Old World animals resembling oxen including, e.g., water buffalo, Cape buffalo	any of several Old World animals resembling oxen including, e.g., water buffalo, Cape buffalo
	large shaggy-haired brown bison of North American plains
	meat from an American bison

Old World buffalo (verb)	buffalo (verb)
	intimidate or overawe