Antebellum and Prewar

Antebellum adjective - Belonging to a period before a war especially the American Civil War.

Prewar and antebellum are semantically related. in before the war topic. In some cases you can use "Prewar" instead an adjective "Antebellum".

Prewar adjective - Existing or belonging to a time before a war.

Antebellum and prewar are semantically related. You can use "Antebellum" instead an adjective "Prewar".