Mediaeval and Nonmodern

Mediaeval adjective - As if belonging to the Middle Ages; old-fashioned and unenlightened.

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

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

Mediaeval and nonmodern are semantically related. You can use "Mediaeval" instead an adjective "Nonmodern".