Antebellum and Old-world

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

Old-world and antebellum are semantically related. In some cases you can use "Old-world" instead an adjective "Antebellum".

Old-world adjective - Pleasantly reminiscent of an earlier time.

Antebellum and old-world are semantically related. You can use "Antebellum" instead an adjective phrase "Old-world".