bulwark vs jetty

bulwark

noun
  • The planking or plating along the sides of a nautical vessel above her gunwale that reduces the likelihood of seas washing over the gunwales and people being washed overboard. 

  • A defensive wall or rampart. 

  • A defense or safeguard. 

  • A breakwater. 

  • Any means of defence or security. 

verb
  • To fortify something with a wall or rampart. 

  • To provide protection of defense for something. 

jetty

noun
  • A wharf or dock extending from the shore. 

  • A part of a building that jets or projects beyond the rest, and overhangs the wall below. 

  • A structure of wood or stone extended into the sea to influence the current or tide, or to protect a harbor or beach. 

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