dull vs mull

dull

verb
  • To soften, moderate or blunt; to make dull, stupid, or sluggish; to stupefy. 

  • To render dull; to remove or blunt an edge or something that was sharp. 

  • To lose a sharp edge; to become dull. 

  • To render dim or obscure; to sully; to tarnish. 

adj
  • Not bright or intelligent; stupid; having slow understanding. 

  • Insensible; unfeeling. 

  • Not intense; felt indistinctly or only slightly. 

  • Sluggish, listless. 

  • Boring; not exciting or interesting. 

  • Not shiny; having a matte finish or no particular luster or brightness. 

  • Lacking the ability to cut easily; not sharp. 

  • Cloudy, overcast. 

  • Heavy; lifeless; inert. 

  • Not clear, muffled. 

mull

verb
  • To dull or stupefy. 

  • To chop marijuana so that it becomes a smokable form. 

  • To powder; to pulverize. 

  • To heat and spice something, such as wine. 

  • To work (over) mentally; to cogitate; to ruminate. 

  • To join two or more individual windows at mullions. 

noun
  • An inferior kind of madder prepared from the smaller roots or the peelings and refuse of the larger. 

  • A stew of meat, broth, milk, butter, vegetables, and seasonings, thickened with soda crackers. 

  • dirt; rubbish 

  • A thin, soft muslin. 

  • A promontory. 

  • A snuffbox made of the small end of a horn. 

  • The gauze used in bookbinding to adhere a text block to a book's cover. 

  • Marijuana that has been chopped to prepare it for smoking. 

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