aurochs vs Bison bonasus

aurochs and Bison bonasus both are nouns.

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

As nouns, aurochs and Bison bonasus are synonyms defined as:

aurochs and Bison bonasus: European bison having a smaller and higher head than the North American bison

Other synonyms of aurochs include wisent.

aurochs (noun)	Bison bonasus (noun)
large recently extinct long-horned European wild ox; considered one of the ancestors of domestic cattle	European bison having a smaller and higher head than the North American bison
European bison having a smaller and higher head than the North American bison