Back of and Retral

Back of preposition - At, to, or toward the rear of.

Retral and back of are semantically related. In some cases you can use "Retral" instead an adjective phrase "Back of".

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

Back of and retral are semantically related. Sometimes you can use "Back of" instead an adjective "Retral".