bombproof vs cellar

bombproof

noun
  • An air-raid shelter, a structure designed to give protection against air raids and bombs. 

adj
  • Sufficiently strong to resist the effects of a blast from a bomb. 

verb
  • To make resistant to bomb blasts. 

cellar

noun
  • An enclosed underground space, often under a building, used for storage or shelter. 

  • A small dish for holding salt. 

  • Last place in a league or competition. 

  • salt cellar 

  • A basement. 

  • A wine collection, especially when stored in a cellar. 

verb
  • To store in a cellar. 

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