age vs Reconstruction Era

age and Reconstruction Era both are nouns.

Word	Noun	Adjective	Verb	Adverb
age	Yes	No	Yes	No
Reconstruction Era	Yes	No	No	No

age (noun)	Reconstruction Era (noun)
how long something has existed	the period after the American Civil War when the southern states were reorganized and reintegrated into the Union; 1865-1877
a time of life (usually defined in years) at which some particular qualification or power arises
a late time of life
an era of history having some distinctive feature
a prolonged period of time