rhino vs perissodactyl mammal

rhino and perissodactyl mammal both are nouns.

Word	Noun	Adjective	Verb	Adverb
rhino	Yes	No	No	No
perissodactyl mammal	Yes	No	No	No

As nouns, perissodactyl mammal is a hypernym of rhino; that is, perissodactyl mammal is a word with a broader meaning than rhino:

rhino: massive powerful herbivorous odd-toed ungulate of southeast Asia and Africa having very thick skin and one or two horns on the snout
perissodactyl mammal: placental mammals having hooves with an odd number of toes on each foot

Other hypernyms of rhino include odd-toed ungulate, perissodactyl.

rhino (noun)	perissodactyl mammal (noun)
massive powerful herbivorous odd-toed ungulate of southeast Asia and Africa having very thick skin and one or two horns on the snout	placental mammals having hooves with an odd number of toes on each foot