hyrax vs rock rabbit

hyrax and rock rabbit both are nouns.

Word	Noun	Adjective	Verb	Adverb
hyrax	Yes	No	No	No
rock rabbit	Yes	No	No	No

As nouns, rock rabbit is a hyponym of hyrax; that is, rock rabbit is a word with a more specific, narrower meaning than hyrax:

hyrax: any of several small ungulate mammals of Africa and Asia with rodent-like incisors and feet with hooflike toes
rock rabbit: hyrax that lives in rocky areas

Other hyponyms of hyrax include Procavia capensis, rock hyrax.

hyrax (noun)	rock rabbit (noun)
any of several small ungulate mammals of Africa and Asia with rodent-like incisors and feet with hooflike toes	small short-eared burrowing mammal of rocky uplands of Asia and western North America
	hyrax that lives in rocky areas