Sennenhunde vs working dog

Sennenhunde and working dog both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sennenhunde	Yes	No	No	No
working dog	Yes	No	No	No

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

Sennenhunde: any of four Swiss breeds
working dog: any of several breeds of usually large powerful dogs bred to work as draft animals and guard and guide dogs

Sennenhunde (noun)	working dog (noun)
any of four Swiss breeds	any of several breeds of usually large powerful dogs bred to work as draft animals and guard and guide dogs