Подстановка в TEdit

var
  words: TStringList;

procedure TForm1.FormCreate(Sender: TObject);
begin
  words := TStringList.Create;
  words.Sorted := true;
  words.Add('one');
  words.Add('two');
  words.Add('four');
  words.Add('five');
  words.Add('six');
  words.Add('seven');
  words.Add('eight');
  words.Add('nine');
  words.Add('ten');
end;

procedure TForm1.Edit1KeyUp(Sender: TObject; var Key: Word;
Shift: TShiftState);
const
  chars: set of char = ['A'..'Z', 'a'..'z', 'А'..'Я', 'а'..'я'];
var
  w: string;
  i: integer;
  s: string;
  full: string;
  SelSt: integer;
begin
  case Key of
    VK_RETURN, VK_TAB:
    begin
      Edit1.SelStart := Edit1.SelStart + Edit1.SelLength;
      Edit1.SelLength := 0;
      Exit;
    end;
    VK_DELETE, VK_BACK:
    begin
      Edit1.ClearSelection;
      Exit;
    end;
  end;
  s := Edit1.Text;
  SelSt := Edit1.SelStart;
  i := SelSt;
  if (length(s) > i) and (s[i+1] in chars) then
    Exit;
  w := '';
  while (i >= 1) and (s[i] in chars) do
  begin
    w := s[i] + w;
    dec(i);
  end;
  if length(w) <= 0 then
    Exit;
  words.Find(w, i);
  if (i >= 0) and (UpperCase(copy(words[i], 1,
  length(w))) = UpperCase(w)) then
  begin
    full := words[i];
    insert(copy(full, length(w) + 1, length(full)), s, SelSt + 1);
    Edit1.Text := s;
    Edit1.SelStart := SelSt;
    Edit1.SelLength := length(full) - length(w);
  end;
end;