kuvasz vs guard dog

kuvasz and guard dog both are nouns.

Word	Noun	Adjective	Verb	Adverb
kuvasz	Yes	No	No	No
guard dog	Yes	No	No	No

As nouns, guard dog is a hypernym of kuvasz; that is, guard dog is a word with a broader meaning than kuvasz:

kuvasz: long-established Hungarian breed of tall light-footed but sturdy white dog; used also as a hunting dog
guard dog: a dog trained to guard property

Other hypernyms of kuvasz include watchdog.

kuvasz (noun)	guard dog (noun)
long-established Hungarian breed of tall light-footed but sturdy white dog; used also as a hunting dog	a dog trained to guard property