proboscidean vs eutherian

proboscidean and eutherian both are nouns.

Word	Noun	Adjective	Verb	Adverb
proboscidean	Yes	No	No	No
eutherian	Yes	Yes	No	No

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

proboscidean: massive herbivorous mammals having tusks and a long trunk
eutherian: mammals having a placenta; all mammals except monotremes and marsupials

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

proboscidean (noun)	eutherian (noun)
massive herbivorous mammals having tusks and a long trunk	mammals having a placenta; all mammals except monotremes and marsupials

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