Mediaeval and Old-world

Mediaeval adjective - Relating to or belonging to the Middle Ages.

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

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

Mediaeval and old-world are semantically related. Sometimes you can use "Mediaeval" instead an adjective phrase "Old-world".