What is the term for a functional or ornamental covering at the foot end of a full couch casket?

The appropriate term for a functional or ornamental covering at the foot end of a full couch casket is "inner panels." Inner panels refer specifically to the interior elements of a casket that may serve decorative roles as well as serve a functional purpose, such as providing a finish and aesthetic appeal inside the casket.

In this context, the foot end of the casket may feature these panels that enhance the overall design and appearance, often lined with fabric or other materials. This area is crucial for creating a welcoming and dignified environment for the deceased, reflecting care in final arrangements.

While the other terms such as "lid," "shell," and "external panel" do have their own significance related to the structure of a casket, they do not accurately describe the specific covering at the foot end. The lid corresponds to the top part that closes the casket, the shell is the exterior structure that forms the body, and the external panel would refer more generally to the outer surfaces rather than the interior decorative elements.