Eschrichtius robustus vs grey whale

Eschrichtius robustus and grey whale both are nouns.

Word	Noun	Adjective	Verb	Adverb
Eschrichtius robustus	Yes	No	No	No
grey whale	Yes	No	No	No

As nouns, Eschrichtius robustus and grey whale are synonyms defined as:

Eschrichtius robustus and grey whale: medium-sized greyish-black whale of the northern Pacific

Other synonyms of Eschrichtius robustus include devilfish, Eschrichtius gibbosus, gray whale.

Eschrichtius robustus (noun)	grey whale (noun)
medium-sized greyish-black whale of the northern Pacific	medium-sized greyish-black whale of the northern Pacific