Bison bonasus vs bison

Bison bonasus and bison both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bison bonasus	Yes	No	No	No
bison	Yes	No	No	No

As nouns, bison is a hypernym of Bison bonasus; that is, bison is a word with a broader meaning than Bison bonasus:

Bison bonasus: European bison having a smaller and higher head than the North American bison
bison: any of several large humped bovids having shaggy manes and large heads and short horns

Bison bonasus (noun)	bison (noun)
European bison having a smaller and higher head than the North American bison	any of several large humped bovids having shaggy manes and large heads and short horns