Sentence:  The covers slid down his skinny neck so I saw his head , fuzzed like a dandelion gone to seed , but his face was turned to the wall - there was the pale shadow of his nose on the <WSD>plaster</WSD> - and I thought , Well you do n't look much like a pig-drunk bully now . 
Meaning of the word marked with <WSD> tags:  a mixture of lime or gypsum with sand and water; hardens into a smooth solid; used to cover walls and ceilings