proboscidian vs eutherian

proboscidian and eutherian both are nouns.

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

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

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

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

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

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