Atlantic walrus vs Odobenus rosmarus

Atlantic walrus and Odobenus rosmarus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Atlantic walrus	Yes	No	No	No
Odobenus rosmarus	Yes	No	No	No

As nouns, Atlantic walrus and Odobenus rosmarus are synonyms defined as:

Atlantic walrus and Odobenus rosmarus: a walrus of northern Atlantic and Arctic waters

Atlantic walrus (noun)	Odobenus rosmarus (noun)
a walrus of northern Atlantic and Arctic waters	a walrus of northern Atlantic and Arctic waters