Sentence:  A few miles from Skara Brae, you can see hearths, <WSD>bedheads</WSD>, and milk crate-style shelving in a cluster of stone houses that are joined by an internal corridor, like those of an apartment block. The houses are five thousand years old, older than the Egyptian pyramids. 
Meaning of the word marked with <WSD> tags:  A vertical panel or board at the end of a bed where the pillow is placed.