After and Retral

After adjective - Being at or in the part of something opposite the front part.

Retral and after are semantically related In some cases you can use "Retral" instead an adjective "After".

Retral adjective - Moving or directed or tending in a backward direction or contrary to a previous direction.

After and retral are semantically related in back topic. You can use "After" instead an adjective "Retral", if it concerns topics such as rear.