batten vs lifeline

batten

noun
  • A long strip of wood, metal, fibreglass etc., used for various purposes aboard ship, especially one inserted in a pocket sewn on the sail in order to keep the sail flat. 

  • A thin strip of wood used in construction to hold members of a structure together or to provide a fixing point. 

  • The movable bar of a loom, which strikes home or closes the threads of a woof. 

  • In stagecraft, a long pipe, usually metal, affixed to the ceiling or fly system in a theater. 

verb
  • To furnish with battens. 

  • To fasten or secure a hatch etc using battens. 

  • To thrive by feeding; grow fat; feed oneself gluttonously. 

  • To fertilize or enrich, as land. 

  • To improve by feeding; fatten; make fat or cause to thrive due to plenteous feeding. 

  • To thrive, prosper, or live in luxury, especially at the expense of others; fare sumptuously. 

  • To gratify a morbid appetite or craving; gloat. 

  • To feed (on); to revel (in). 

  • To become better; improve in condition, especially by feeding. 

lifeline

noun
  • On the deck of a boat, a line to which one can attach oneself to stay aboard on rough seas. 

  • A particular crease in the palm. 

  • A line from the diver to a tender at the surface control point. 

  • A line to which a drowning or falling victim may cling. 

  • A means or route for transporting indispensable supplies. 

  • System or structure of vital importance to a community. 

  • A source of salvation in a crisis. 

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