Euarctos americanus vs Ursus americanus

Euarctos americanus and Ursus americanus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Euarctos americanus	Yes	No	No	No
Ursus americanus	Yes	No	No	No

As nouns, Euarctos americanus and Ursus americanus are synonyms defined as:

Euarctos americanus and Ursus americanus: brown to black North American bear; smaller and less ferocious than the brown bear

Other synonyms of Euarctos americanus include American black bear, black bear.

Euarctos americanus (noun)	Ursus americanus (noun)
brown to black North American bear; smaller and less ferocious than the brown bear	brown to black North American bear; smaller and less ferocious than the brown bear