Ex and Erstwhile

Ex adjective - Out of fashion.

Erstwhile and ex are semantically related in dead topic. In some cases you can use "Erstwhile" instead an adjective "Ex", when it comes to topics like former, olden, previous in time or order.

Erstwhile adjective - Having been such at some previous time.

Ex and erstwhile are semantically related in former topic. You can use "Ex" instead an adjective "Erstwhile".