Boro vs Borough

Boro

name
  • The town of Middlesbrough, and more specifically Middlesbrough FC football club. 

  • Stevenage Football Club, a football team from Stevenage formerly known as Stevenage Borough Football Club 

Borough

name
  • The area, properly called Southwark, just south of London Bridge, which is at the north end of Borough High Street (OS grid ref TQ3279). 

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