As nouns the difference between reformation and reconstruction
is that
reformation is an improvement (or an intended improvement) in the existing form or condition of institutions or practices etc.; intended to make a striking change for the better in social or political or religious affairs while
reconstruction is a thing that has been reconstructed or restored to an earlier state.
As proper nouns the difference between reformation and reconstruction
is that
reformation is the religious movement initiated by
Martin Luther in the 16th century to reform the Roman Catholic Church while
Reconstruction is a period of the history of the United States from 1865 to 1877, during which the nation tried to resolve the status of the ex-Confederate states, the ex-Confederate leaders, and the Freedmen (ex-slaves) after the American Civil War.