Orycteropus afer vs placental

Orycteropus afer and placental both are nouns.

Word	Noun	Adjective	Verb	Adverb
Orycteropus afer	Yes	No	No	No
placental	Yes	Yes	No	No

As nouns, placental is a hypernym of Orycteropus afer; that is, placental is a word with a broader meaning than Orycteropus afer:

Orycteropus afer: nocturnal burrowing mammal of the grasslands of Africa that feeds on termites; sole extant representative of the order Tubulidentata
placental: mammals having a placenta; all mammals except monotremes and marsupials

Other hypernyms of Orycteropus afer include eutherian, eutherian mammal, placental mammal.

Orycteropus afer (noun)	placental (noun)
nocturnal burrowing mammal of the grasslands of Africa that feeds on termites; sole extant representative of the order Tubulidentata	mammals having a placenta; all mammals except monotremes and marsupials

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