ferment vs mad

ferment

verb
  • To stir up, agitate, cause unrest or excitement in. 

  • To react, using fermentation; especially to produce alcohol by aging or by allowing yeast to act on sugars; to brew. 

noun
  • Something, such as a yeast or barm, that causes fermentation. 

  • A gentle internal motion of the constituent parts of a fluid; fermentation. 

  • A state of agitation or of turbulent change. 

  • A catalyst. 

mad

verb
  • To madden, to anger, to frustrate. 

adv
  • Intensifier; to a large degree; extremely; exceedingly; very; unbelievably. 

adj
  • Bizarre; incredible. 

  • Extremely foolish or unwise; irrational; imprudent. 

  • Having impaired polarity. 

  • Wildly confused or excited. 

  • Intensifier, signifying abundance or high quality of a thing; very, much or many. 

  • Abnormally ferocious or furious; or, rabid, affected with rabies. 

  • Insane; crazy, mentally deranged. 

  • Used litotically to indicate satisfaction or approval. 

  • Angry, annoyed. 

  • Extremely enthusiastic about; crazy about; infatuated with; overcome with desire for. 

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