soundex

A phonetic spelling (up to six characters) of a street name, used for address matching. Each of the 26 letters in the English alphabet are replaced with a letter in the soundex equivalent:

English: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Soundex: A B C D A B C H A C C L M M A B C R C D A B W C A C

Where possible, geocoding uses a soundex equivalent of street names for faster processing. During geocoding, initial candidate street names are found using soundex, then real names are compared and verified. See also geocode.