ark vs nacelle

ark

noun
  • A spacious type of boat with a flat bottom. 

  • A decorated cabinet at the front of a synagogue, in which Torah scrolls are kept. 

  • Something affording protection; safety, shelter, refuge 

  • The Ark of the Covenant. 

  • A large box with a flat lid. 

  • Noah's Ark: the ship built by Noah to save his family and a collection of animals from the deluge. 

nacelle

noun
  • The submersed providers of buoyancy of a SWATH hulled boat. 

  • A separate streamlined enclosure mounted on an aircraft to house an engine, cargo, or crew. 

  • The compartment that holds passengers on a hot-air balloon, a dirigible, or an aerostat; a gondola. 

  • The part between the tower and rotor of a wind turbine. 

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