ungulate vs placental

ungulate and placental both are nouns.

Word	Noun	Adjective	Verb	Adverb
ungulate	Yes	Yes	No	No
placental	Yes	Yes	No	No

As nouns, placental is a hypernym of ungulate; that is, placental is a word with a broader meaning than ungulate:

ungulate: any of a number of mammals with hooves that are superficially similar but not necessarily closely related taxonomically
placental: mammals having a placenta; all mammals except monotremes and marsupials

Other hypernyms of ungulate include eutherian, eutherian mammal, placental mammal.

ungulate (noun)	placental (noun)
any of a number of mammals with hooves that are superficially similar but not necessarily closely related taxonomically	mammals having a placenta; all mammals except monotremes and marsupials

ungulate (adjective)	placental (adjective)
having or resembling hoofs	pertaining to or having or occurring by means of a placenta