ramrod vs trunnion

ramrod

noun
  • Device used with muzzleloaders to push the projectile up against the propellant. 

  • Ranch or trail foreman, usually the first or second person in charge. The person responsible for getting the work done. 

  • An erect penis. 

verb
  • To force. 

trunnion

noun
  • One of the short stubby bearings on either side of a cannon; a gudgeon. 

  • A similar rotational bearing comprising a rotating arc or ring sliding in the groove of a stationary arc, used in machinery to allow a workpiece to be moved relative to a fixed tool. 

  • A similar rotational bearing used in automotive suspensions. 

  • A shaft, held by a bearing, at each end or side of a rotatable object. 

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