8. The system of claim 6 , wherein each syntactic edit distance between query domain names is determined by: calculating an edit distance between syntax strings of the corresponding query domain names.
8. The system of claim 6 , wherein each syntactic edit distance between query domain names is determined by: calculating an edit distance between syntax strings of the corresponding query domain names. 9. The system of claim 8 , wherein the instructions further cause the processor to: determine, for each query domain name, a measure of similarity to each other query domain name, each measure of similarity being determined between a first domain name and a second domain name by: determining an edit distance between the first query domain name and the second query domain name; and calculating the measure of similarity between the first query domain name and the second query domain name based on the edit distance and the syntactic edit distance.