Fissipedia vs placental mammal

Fissipedia and placental mammal both are nouns.

Word	Noun	Adjective	Verb	Adverb
Fissipedia	Yes	No	No	No
placental mammal	Yes	No	No	No

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

Fissipedia: in some classifications considered a suborder of Carnivora
placental mammal: mammals having a placenta; all mammals except monotremes and marsupials

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

Fissipedia (noun)	placental mammal (noun)
in some classifications considered a suborder of Carnivora	mammals having a placenta; all mammals except monotremes and marsupials