founder vs precursor

founder

noun
  • One who founds or establishes (especially said of a company, project, organisation, state). 

  • One who casts metals in various forms; a caster. 

  • The iron worker in charge of the blast furnace and the smelting operation. 

  • A severe laminitis of a horse, caused by untreated internal inflammation in the hooves. 

  • Someone for whose parents one has no data. 

verb
  • To flood with water and sink. 

  • To fail; to miscarry. 

  • To disable or lame (a horse) by causing internal inflammation and soreness in the feet or limbs. 

  • To fall; to stumble and go lame, as a horse. 

precursor

noun
  • That which precurses: a forerunner, predecessor, or indicator of approaching events. 

  • One of the compounds that participates in the chemical reaction that produces another compound. 

adj
  • Caused by the following symbol. 

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