grey whale vs Eschrichtius robustus

grey whale and Eschrichtius robustus both are nouns.

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

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

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

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

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