Reconstruction Era vs Reconstruction Period

Reconstruction Era and Reconstruction Period both are nouns.

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

As nouns, Reconstruction Era and Reconstruction Period are synonyms defined as:

Reconstruction Era and Reconstruction Period: the period after the American Civil War when the southern states were reorganized and reintegrated into the Union; 1865-1877

Other synonyms of Reconstruction Era include Reconstruction.

Reconstruction Era (noun)	Reconstruction Period (noun)
the period after the American Civil War when the southern states were reorganized and reintegrated into the Union; 1865-1877	the period after the American Civil War when the southern states were reorganized and reintegrated into the Union; 1865-1877