razor-billed auk vs auk

razor-billed auk and auk both are nouns.

Word	Noun	Adjective	Verb	Adverb
razor-billed auk	Yes	No	No	No
auk	Yes	No	No	No

As nouns, auk is a hypernym of razor-billed auk; that is, auk is a word with a broader meaning than razor-billed auk:

razor-billed auk: black-and-white northern Atlantic auk having a compressed sharp-edged bill
auk: black-and-white short-necked web-footed diving bird of northern seas

razor-billed auk (noun)	auk (noun)
black-and-white northern Atlantic auk having a compressed sharp-edged bill	black-and-white short-necked web-footed diving bird of northern seas