cellar vs root cellar

cellar

verb
  • To store in a cellar. 

noun
  • 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. 

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

root cellar

verb
  • To cellar (food) in a root cellar. 

noun
  • A structure built underground or partially underground and used to store vegetables, fruits, and nuts or other foods. 

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