carnivore vs placental

carnivore and placental both are nouns.

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

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

carnivore: a terrestrial or aquatic flesh-eating mammal
placental: mammals having a placenta; all mammals except monotremes and marsupials

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

carnivore (noun)	placental (noun)
a terrestrial or aquatic flesh-eating mammal	mammals having a placenta; all mammals except monotremes and marsupials
any animal that feeds on flesh

carnivore (adjective)	placental (adjective)
	pertaining to or having or occurring by means of a placenta