ending vs eternal

ending

noun
  • A termination or conclusion. 

  • The last part of something. 

  • The last morpheme of a word, added to some base to make an inflected form (such as -s in "dogs"). 

eternal

noun
  • One who lives forever; an immortal. 

adj
  • existing outside time; as opposed to sempiternal, existing within time but everlastingly 

  • Lasting forever; unending. 

  • Constant; perpetual; ceaseless; ever-present. 

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