mammalian vs allantois

mammalian and allantois both are nouns.

Word	Noun	Adjective	Verb	Adverb
mammalian	Yes	Yes	No	No
allantois	Yes	No	No	No

mammalian (noun)	allantois (noun)
any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk	the vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals)

mammalian (adjective)	allantois (adjective)
of or relating to the class Mammalia