Plott hound vs hound dog

Plott hound and hound dog both are nouns.

Word	Noun	Adjective	Verb	Adverb
Plott hound	Yes	No	No	No
hound dog	Yes	No	No	No

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

Plott hound: a brindle-coated American hound used in hunting bears and wild boars
hound dog: any of several breeds of dog used for hunting typically having large drooping ears

Other hypernyms of Plott hound include hound.

Plott hound (noun)	hound dog (noun)
a brindle-coated American hound used in hunting bears and wild boars	any of several breeds of dog used for hunting typically having large drooping ears