Saluki vs hound dog

Saluki and hound dog both are nouns.

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

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

Saluki: old breed of tall swift keen-eyed hunting dogs resembling greyhounds; from Egypt and southwestern Asia
hound dog: any of several breeds of dog used for hunting typically having large drooping ears

Other hypernyms of Saluki include hound.

Saluki (noun)	hound dog (noun)
old breed of tall swift keen-eyed hunting dogs resembling greyhounds; from Egypt and southwestern Asia	any of several breeds of dog used for hunting typically having large drooping ears