Phocoena sinus vs vaquita

Phocoena sinus and vaquita both are nouns.

Word	Noun	Adjective	Verb	Adverb
Phocoena sinus	Yes	No	No	No
vaquita	Yes	No	No	No

As nouns, Phocoena sinus and vaquita are synonyms defined as:

Phocoena sinus and vaquita: a short porpoise that lives in the Gulf of California; an endangered species

Phocoena sinus (noun)	vaquita (noun)
a short porpoise that lives in the Gulf of California; an endangered species	a short porpoise that lives in the Gulf of California; an endangered species