Nonmodern and Old-world

Nonmodern adjective - Not modern; of or characteristic of an earlier time.

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

Old-world adjective - Characteristic of former times especially in Europe.

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