vaquita vs porpoise

vaquita and porpoise both are nouns.

Word	Noun	Adjective	Verb	Adverb
vaquita	Yes	No	No	No
porpoise	Yes	No	No	No

As nouns, porpoise is a hypernym of vaquita; that is, porpoise is a word with a broader meaning than vaquita:

vaquita: a short porpoise that lives in the Gulf of California; an endangered species
porpoise: any of several small gregarious cetacean mammals having a blunt snout and many teeth

vaquita (noun)	porpoise (noun)
a short porpoise that lives in the Gulf of California; an endangered species	any of several small gregarious cetacean mammals having a blunt snout and many teeth