tree shrew vs eutherian mammal

tree shrew and eutherian mammal both are nouns.

Word	Noun	Adjective	Verb	Adverb
tree shrew	Yes	No	No	No
eutherian mammal	Yes	No	No	No

As nouns, eutherian mammal is a hypernym of tree shrew; that is, eutherian mammal is a word with a broader meaning than tree shrew:

tree shrew: insectivorous arboreal mammal of southeast Asia that resembles a squirrel with large eyes and long sharp snout
eutherian mammal: mammals having a placenta; all mammals except monotremes and marsupials

Other hypernyms of tree shrew include eutherian, placental, placental mammal.

tree shrew (noun)	eutherian mammal (noun)
insectivorous arboreal mammal of southeast Asia that resembles a squirrel with large eyes and long sharp snout	mammals having a placenta; all mammals except monotremes and marsupials