allantois vs mammalian

allantois and mammalian both are nouns.

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

allantois (noun)	mammalian (noun)
the vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals)	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

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