The term 'church porch vestibule' refers to a space located at the entrance of a church. It is typically a small area with a roof and walls, and is often used as a waiting area for visitors. The word 'TAMBOUR' is a seven-letter word that refers to a type of drum or a curved frame used in embroidery. It is also used to describe an arch or a curved wall, which is often seen in the design of a church porch vestibule.