hound vs gazelle hound

hound and gazelle hound both are nouns.

Word	Noun	Adjective	Verb	Adverb
hound	Yes	No	Yes	No
gazelle hound	Yes	No	No	No

As nouns, gazelle hound is a hyponym of hound; that is, gazelle hound is a word with a more specific, narrower meaning than hound:

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

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

hound (verb)	gazelle hound (verb)
pursue or chase relentlessly