blowhole vs shaft

blowhole

noun
  • A vent for the escape of steam or other gas. 

  • A top-facing opening to a cavity in the ground very near an ocean's shore, leading to a marine cave from which wave water or bursts of air are expelled. 

  • The spiracle, on the top of the head, through which cetaceans breathe. 

  • A vertical opening in the top of a computer case that lets hot air (primarily from the CPU heat sink) escape quickly. 

  • An unintended cavity filled with air in a casting product. 

verb
  • To fill or be filled with air in an unintended cavity. 

shaft

noun
  • The chamber of a blast furnace. 

  • A vertical or inclined passage sunk into the earth as part of a mine 

  • A vertical passage housing a lift or elevator; a liftshaft. 

  • A beam or ray of light. 

  • Anything cast or thrown as a spear or javelin. 

  • The main axis of a feather. 

  • Any column or pillar, particularly the body of a column between its capital and pedestal. 

  • The long, narrow, central body of a spear, arrow, or javelin. 

  • A ventilation or heating conduit; an air duct. 

  • A relatively small area of precipitation that an onlook can discern from the dry surrounding area. 

  • The main cylindrical part of the penis. 

  • Any long thin object, such as the handle of a tool, one of the poles between which an animal is harnessed to a vehicle, the driveshaft of a motorized vehicle with rear-wheel drive, an axle, etc. 

  • The long narrow body of a lacrosse stick. 

verb
  • To fuck over; to cause harm to, especially through deceit or treachery. 

  • To equip with a shaft. 

  • To fuck; to have sexual intercourse with. 

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