insectivore vs placental

insectivore and placental both are nouns.

Word	Noun	Adjective	Verb	Adverb
insectivore	Yes	No	No	No
placental	Yes	Yes	No	No

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

insectivore: small insect-eating mainly nocturnal terrestrial or fossorial mammals
placental: mammals having a placenta; all mammals except monotremes and marsupials

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

insectivore (noun)	placental (noun)
small insect-eating mainly nocturnal terrestrial or fossorial mammals	mammals having a placenta; all mammals except monotremes and marsupials
any organism that feeds mainly on insects

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