foment vs spurge

foment

verb
  • To apply a poultice to; to bathe with a cloth or sponge. 

  • To incite or cause troublesome acts; to encourage; to instigate. 

noun
  • Fomentation. 

spurge

verb
  • To emit foam; to froth; said of the emission of yeast from beer during fermentation. 

noun
  • Any plant of the genus Euphorbia, a diverse genus of over 2,000 species. 

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