fail vs realize

fail

verb
  • Not to achieve a particular stated goal. (Usage note: The direct object of this word is usually an infinitive.) 

  • To become unable to meet one's engagements; especially, to be unable to pay one's debts or discharge one's business obligation; to become bankrupt or insolvent. 

  • To receive one or more non-passing grades in academic pursuits. 

  • To give a student a non-passing grade in an academic endeavour. 

  • To be wanting to, to be insufficient for, to disappoint, to desert; to disappoint one's expectations. 

  • To be wanting; to fall short; to be or become deficient in any measure or degree up to total absence. 

  • To neglect. 

  • To be unsuccessful. 

  • Of a machine, etc.: to cease to operate correctly. 

noun
  • A failure, especially of a financial transaction (a termination of an action). 

  • A failure (condition of being unsuccessful). 

  • A failing grade in an academic examination. 

  • Poor quality; substandard workmanship. 

  • A failure (something incapable of success). 

  • A piece of turf cut from grassland. 

adj
  • Unsuccessful; inadequate; unacceptable in some way. 

realize

verb
  • To acquire as an actual possession; to obtain as the result of plans and efforts; to gain; to get 

  • To become aware of (a fact or situation, especially of something that has been true for a long time). 

  • To cause to seem real to other people. 

  • To turn an abstract linguistic object into actual language, especially said of a phoneme's conversion into speech sound. 

  • To make real; to convert from the imaginary or fictitious into reality; to bring into real existence 

  • To convert any kind of property into money, especially property representing investments, such as shares, bonds, etc. 

  • To sense vividly or strongly; to make one's own in thought or experience. 

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