Nouns

(n)stretchera wooden framework on which canvas is stretched and fixed for oil painting
(n)stretchera mechanical device used to make something larger (as shoes or gloves) by stretching it
(n)stretchera litter for transporting people who are ill or wounded or dead; usually consists of a sheet of canvas stretched between two poles
(n)capstone, copestone, coping stone, stretchera stone that forms the top of wall or building