tree shrew vs eutherian

tree shrew and eutherian both are nouns.

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

As nouns, eutherian is a hypernym of tree shrew; that is, eutherian 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: mammals having a placenta; all mammals except monotremes and marsupials

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

tree shrew (noun)	eutherian (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

tree shrew (adjective)	eutherian (adjective)
	of or relating to or belonging to the subclass Eutheria