irradiate vs radiated

irradiate

adj
  • Illuminated; irradiated; made brilliant or splendid. 

verb
  • To radiate, shed, or diffuse. 

  • To emit rays; to shine. 

  • To animate by heat or light. 

  • To treat (food) with ionizing radiation in order to destroy bacteria. 

  • To decorate with shining ornaments. 

  • To illuminate; to brighten; to shine light on. 

  • To enlighten intellectually; to illuminate. 

  • To treat (a tumour or cancerous growth) with radiation. 

radiated

adj
  • Synonym of radiate 

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