Eschrichtius robustus vs Eschrichtius gibbosus

Eschrichtius robustus and Eschrichtius gibbosus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Eschrichtius robustus	Yes	No	No	No
Eschrichtius gibbosus	Yes	No	No	No

As nouns, Eschrichtius robustus and Eschrichtius gibbosus are synonyms defined as:

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

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

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