placental vs placental mammal

placental and placental mammal both are nouns.

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

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

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

Other synonyms of placental include eutherian, eutherian mammal.

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

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