den vs quoin

den

noun
  • A squalid or wretched place; a haunt. 

  • Synonym of fort (“structure improvised from furniture, etc. for playing games.”) 

  • A comfortable room not used for formal entertaining. 

  • A group of Cub Scouts of the same age who work on projects together. 

  • A small cavern or hollow place in the side of a hill, or among rocks; especially, a cave used by a wild animal for shelter or concealment. 

verb
  • To ensconce or hide oneself in (or as in) a den. 

quoin

noun
  • The keystone of an arch. 

  • Any of the corner building blocks of a building, usually larger or more ornate than the surrounding blocks. 

  • A number of apple varieties with a distinctive ribbed appearance, like corners of a coin. 

  • A metal wedge which fits into the space between the type and the edge of a chase, and is tightened to fix the metal type in place. 

  • A wedge of wood or iron put under the breech of heavy guns or the muzzle of siege-mortars to raise them to the proper level. 

verb
  • To wedge or steady with quoins. 

How often have the words den and quoin occurred in a corpus of books? (source: Google Ngram Viewer )