Great Pyrenees vs domestic dog

Great Pyrenees and domestic dog both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Pyrenees	Yes	No	No	No
domestic dog	Yes	No	No	No

As nouns, domestic dog is a hypernym of Great Pyrenees; that is, domestic dog is a word with a broader meaning than Great Pyrenees:

Great Pyrenees: bred of large heavy-coated white dogs resembling the Newfoundland
domestic dog: a member of the genus Canis (probably descended from the common wolf) that has been domesticated by man since prehistoric times; occurs in many breeds

Other hypernyms of Great Pyrenees include Canis familiaris, dog.

Great Pyrenees (noun)	domestic dog (noun)
bred of large heavy-coated white dogs resembling the Newfoundland	a member of the genus Canis (probably descended from the common wolf) that has been domesticated by man since prehistoric times; occurs in many breeds