hippopotamus vs artiodactyl

hippopotamus and artiodactyl both are nouns.

Word	Noun	Adjective	Verb	Adverb
hippopotamus	Yes	No	No	No
artiodactyl	Yes	Yes	No	No

As nouns, artiodactyl is a hypernym of hippopotamus; that is, artiodactyl is a word with a broader meaning than hippopotamus:

hippopotamus: massive thick-skinned herbivorous animal living in or around rivers of tropical Africa
artiodactyl: placental mammal having hooves with an even number of functional toes on each foot

Other hypernyms of hippopotamus include artiodactyl mammal, even-toed ungulate.

hippopotamus (noun)	artiodactyl (noun)
massive thick-skinned herbivorous animal living in or around rivers of tropical Africa	placental mammal having hooves with an even number of functional toes on each foot

hippopotamus (adjective)	artiodactyl (adjective)
	of or relating to or belonging to mammals of the order Artiodactyla