District vs Index

District

name
  • The District of Columbia, the federal district of the United States. 

  • The District Line of the London Underground, originally known as the District Railway. 

  • Any of numerous governmental districts. 

Index

name
  • A town in Snohomish County, Washington. 

  • An unincorporated community in Gilmer County, West Virginia. 

  • An unincorporated community in Morgan County, Kentucky. 

  • A small hamlet in Otsego County, New York. 

  • A ghost town in Cass County, Missouri. 

  • An unincorporated community in King George County, Virginia. 

  • An unincorporated community in Miller County, Arkansas. 

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