approximate vs neighbour

approximate

verb
  • To come near to; to approach. 

  • To carry or advance near; to cause to approach. 

  • To estimate. 

adj
  • Nearing correctness; nearly exact; not perfectly accurate. 

  • Approaching; proximate; nearly resembling. 

neighbour

verb
  • To be adjacent to 

  • To be similar to, to be almost the same as. 

  • To associate intimately with; to be close to. 

noun
  • A person living on adjacent or nearby land; a person situated adjacently or nearby; anything (of the same type of thing as the subject) in an adjacent or nearby position. 

  • One who is near in sympathy or confidence. 

  • A fellow human being. 

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