stretcher

(noun) a wooden framework on which canvas is stretched and fixed for oil painting.

(noun) a mechanical device used to make something larger (as shoes or gloves) by stretching it.

(noun) a litter for transporting people who are ill or wounded or dead; usually consists of a sheet of canvas stretched between two poles.

(noun) a stone that forms the top of wall or building. Synonyms: capstone, copestone, coping stone.