placental vs eutherian mammal

placental and eutherian mammal both are nouns.

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

As nouns, placental and eutherian mammal are synonyms defined as:

placental and eutherian mammal: mammals having a placenta; all mammals except monotremes and marsupials

Other synonyms of placental include eutherian, placental mammal.

placental (noun)	eutherian mammal (noun)
mammals having a placenta; all mammals except monotremes and marsupials	mammals having a placenta; all mammals except monotremes and marsupials

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