edentate vs placental

edentate and placental both are nouns.

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

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

edentate: primitive terrestrial mammal with few if any teeth; of tropical Central America and South America
placental: mammals having a placenta; all mammals except monotremes and marsupials

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

edentate (noun)	placental (noun)
primitive terrestrial mammal with few if any teeth; of tropical Central America and South America	mammals having a placenta; all mammals except monotremes and marsupials

edentate (adjective)	placental (adjective)
having few if any teeth	pertaining to or having or occurring by means of a placenta