back out vs surrender

back out

verb
  • To withdraw from something one has agreed to do. 

  • To exit a mode or function. 

  • To draw from behind the back [+accusative = a knife etc.] (as also bare back). 

  • To undo (a change). 

  • Coordinate terms: cancel, call off, get cold feet 

  • To reverse (a vehicle) from a confined space. 

  • See also: sell short 

  • To dare (someone) to not withdraw from a challenge. 

  • To bet on someone losing. 

  • Coordinate term: scare off 

surrender

verb
  • To give up possession of; to yield; to resign. 

  • To yield (a town, a fortification, etc.) to an enemy. 

  • To give up into the power, control, or possession of another. 

  • To yield (oneself) to an influence, emotion, passion, etc. 

  • For a policyholder, to voluntarily terminate an insurance contract before the end of its term, usually with the expectation of receiving a surrender value. 

  • To abandon (one's hand of cards) and recover half of the initial bet. 

  • To give oneself up into the power of another, especially as a prisoner; to submit or give in. 

noun
  • An act of surrendering, submission into the possession of another; abandonment, resignation. 

  • The yielding or delivery of a possession in response to a demand. 

  • The yielding of the leasehold estate by the lessee to the landlord, so that the tenancy for years merges in the reversion and no longer exists. 

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