foam vs mull

foam

verb
  • To form or emit foam. 

  • To spew saliva as foam; to foam at the mouth. 

  • To coat or cover with foam. 

noun
  • A collection of small bubbles created when the surface of a body of water is moved by tides, wind, etc. 

  • A substance composed of a large collection of bubbles or their solidified remains, especially 

  • Fury. 

  • A material formed by trapping pockets of gas in a liquid or solid. 

  • A collection of small bubbles on the surface of a liquid that is heated, fermented or carbonated. 

  • A collection of small bubbles created by mixing soap with water. 

  • A collection of small bubbles formed by mixing an extinguishing agent with water, used to cover and extinguish fires. 

  • A collection of small bubbles formed from bodily fluids such as saliva or sweat. 

  • The sea. 

mull

verb
  • To powder; to pulverize. 

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

  • To dull or stupefy. 

  • 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 foam and mull occurred in a corpus of books? (source: Google Ngram Viewer )