Prior to the war and Prewar

Prewar and prior to the war are semantically related in before the war topic. In some cases you can use "Prewar" instead an adjective phrase "Prior to the war".

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

Prior to the war and prewar are semantically related in before the war topic. You can use "Prior to the war" instead an adjective "Prewar".