U vs u

U

name
  • A language belonging to the Austroasiatic language family which is spoken in China. 

adj
  • Usually in parentheses: abbreviation of unclassified. 

  • In a film certificate: abbreviation of universal (“suitable for all ages”). 

character
  • A U-turn ('turned a U in the road') 

  • The twenty-first letter of the English alphabet, called u and written in the Latin script. 

  • A double upright cordon espalier (also double U, triple U). 

noun
  • A U-turn. 

u

noun
  • The name of the Latin-script letter U/u. 

  • A thing in the shape of the letter U 

pron
  • you (in text messaging and internet conversations) 

character
  • The twenty-first letter of the English alphabet, called u and written in the Latin script. 

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