words matching tool Options

[mat_o]

hi, could you please recommend me some program which: i need to make a list of names, some of the names are repeating, and i do not nead the same names in a list, could you please recommend me a program which can automatically delete them after type or somehow mark the same ones to have no need of searching every single name of the "completed" list, is it possible to do it somehow in word, thank you very much, matt.