decay vs putrefy

decay

verb
  • To rot, to go bad. 

  • To undergo bit rot, that is, gradual degradation. 

  • To deteriorate, to get worse, to lose strength or health, to decline in quality. 

  • To undergo optical decay, that is, to relax to a less excited state, usually by emitting a photon or phonon. 

  • Loss of airspeed due to drag. 

  • To undergo software rot, that is, to fail to be updated in a changing environment, so as to eventually become legacy or obsolete. 

  • To change by undergoing fission, by emitting radiation, or by capturing or losing one or more electrons; to undergo radioactive decay. 

  • To cause to rot or deteriorate. 

  • Of an array: to lose its type and dimensions and be reduced to a pointer, for example when passed to a function. 

  • To undergo prolonged reduction in altitude (above the orbited body). 

noun
  • The process or result of being gradually decomposed. 

  • A deterioration of condition; loss of status or fortune. 

  • The situation, in programming languages such as C, where an array loses its type and dimensions and is reduced to a pointer, for example by passing it to a function. 

putrefy

verb
  • To corrupt; to make foul. 

  • To make morbid, carious, or gangrenous. 

  • To become filled with a pus-like or bile-like substance. 

  • To reach an advanced stage of decomposition. 

  • To become gangrenous. 

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