accelerator vs petrol

accelerator

noun
  • A pedal causing the vehicle to accelerate when it is pressed. 

  • A computer component using dedicated hardware to accelerate the processing and display of graphics. 

  • A muscle or nerve that speeds the performance of an action. 

  • An accelerator key. 

  • A device for causing acceleration. 

  • A device that accelerates charged subatomic particles; a particle accelerator. 

  • A light van to take mails between a post office and a railway station. 

  • One who, or that which, accelerates. 

  • A substance which speeds up chemical reactions. 

  • A chemical that reduces development time. 

petrol

noun
  • A motor vehicle powered by petrol (as opposed to diesel). 

  • petroleum, a fluid consisting of a mixture of refined petroleum hydrocarbons, primarily consisting of octane, commonly used as a motor fuel. 

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