You could also use a range variable:
Code:
Sub Invited()
Dim oRng As Range
Set oRng = ActiveDocument.Range
With oRng.Find
.Text = "invited"
.Wrap = wdFindStop
While .Execute
oRng.Select
Selection.HomeKey Unit:=wdLine
Selection.Characters.First = ChrW(55357) & ChrW(56395)
oRng.Collapse wdCollapseEnd
Wend
End With
End Sub