Pinguinus impennis vs auk

Pinguinus impennis and auk both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pinguinus impennis	Yes	No	No	No
auk	Yes	No	No	No

As nouns, auk is a hypernym of Pinguinus impennis; that is, auk is a word with a broader meaning than Pinguinus impennis:

Pinguinus impennis: large flightless auk of rocky islands off northern Atlantic coasts; extinct
auk: black-and-white short-necked web-footed diving bird of northern seas

Pinguinus impennis (noun)	auk (noun)
large flightless auk of rocky islands off northern Atlantic coasts; extinct	black-and-white short-necked web-footed diving bird of northern seas