den vs lounge

den

noun
  • A comfortable room not used for formal entertaining. 

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

  • 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. 

  • A squalid or wretched place; a haunt. 

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

lounge

noun
  • A large comfortable seat for two or three people or more, a sofa or couch; also called lounge chair. 

  • An establishment, similar to a bar, that serves alcohol and often plays background music or shows television. 

  • The act of someone who lounges; idle reclining. 

  • The living room or sitting room of a house. 

  • A waiting room in an office, airport etc. 

verb
  • To relax; to spend time lazily; to stand, sit, or recline, in an indolent manner. 

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