era vs Cenozoic

era and Cenozoic both are nouns.

Word	Noun	Adjective	Verb	Adverb
era	Yes	No	No	No
Cenozoic	Yes	Yes	No	No

era (noun)	Cenozoic (noun)
a period marked by distinctive character or reckoned from a fixed point or event	approximately the last 63 million years
a major division of geological time; an era is usually divided into two or more periods

era (adjective)	Cenozoic (adjective)
	of or relating to or denoting the Cenozoic era