fallback vs pullout

fallback

noun
  • An act of falling back. 

  • Pulverised material that falls back to earth after a nuclear explosion; fallout. 

  • A backup plan or contingency strategy; an alternative which can be used if something goes wrong with the main plan; a recourse. 

  • A reduction in bitumen softening point, sometimes called refluxing or overheating, in a relatively closed container. 

adj
  • That can be resorted to as a fallback. 

pullout

noun
  • Synonym of liftout (“quotation given special visual treatment”) 

  • The ending of a period of surfing by navigating the board into or over the back of a wave. 

  • The coitus interruptus method of birth control. 

  • An object, such as a newspaper supplement, that can be pulled out from something else. 

  • The change of the flight of an aircraft from a dive to level or climbing flight. 

  • A withdrawal, especially of armed forces. 

  • An area by the side of a road where vehicles may temporarily stop in safety. Typical pullouts allow drivers and passengers to safely exit the vehicle but rarely have additional amenities. 

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