aurochs vs urus

aurochs and urus both are nouns.

Word	Noun	Adjective	Verb	Adverb
aurochs	Yes	No	No	No
urus	Yes	No	No	No

As nouns, aurochs and urus are synonyms defined as:

aurochs and urus: large recently extinct long-horned European wild ox; considered one of the ancestors of domestic cattle

Other synonyms of aurochs include Bos primigenius.

aurochs (noun)	urus (noun)
large recently extinct long-horned European wild ox; considered one of the ancestors of domestic cattle	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