Sub Demo()
Application.ScreenUpdating = False
Dim strFolder As String, strFile As String, wdDoc As Document
Dim xlApp As Object, xlWkBk As Object, StrWkBkNm As String, StrWkSht As String
Dim bStrt As Boolean, iDataRow As Long, bFound As Boolean
Dim xlFList As String, xlRList As String, i As Long, Rslt

'Relative path
Dim My_Path As String
My_Path = Application.ActiveDocument.Path
StrWkBkNm = My_Path & "\Table.xls"
StrWkSht = "list"
If Dir(StrWkBkNm) = "" Then
  MsgBox "Cannot find the designated workbook: " & StrWkBkNm, vbExclamation
  Exit Sub
End If
'Get the folder to process
 strFolder = GetFolder
 If strFolder = "" Then Exit Sub
 strFile = Dir(strFolder & "\*.doc", vbNormal)

' Test whether Excel is already running.
On Error Resume Next
bStrt = False ' Flag to record if we start Excel, so we can close it later.
Set xlApp = GetObject(, "Excel.Application")
'Start Excel if it isn't running
If xlApp Is Nothing Then
  Set xlApp = CreateObject("Excel.Application")
  If xlApp Is Nothing Then
    MsgBox "Can't start Excel.", vbExclamation
    Exit Sub
  End If
  ' Record that we've started Excel.
  bStrt = True
End If
On Error GoTo 0
'Check if the workbook is open.
bFound = False
With xlApp
  'Hide our Excel session
  If bStrt = True Then .Visible = False
  For Each xlWkBk In .Workbooks
    If xlWkBk.FullName = StrWkBkNm Then ' It's open
      Set xlWkBk = xlWkBk
      bFound = True
      Exit For
    End If
  Next
  ' If not open by the current user.
  If bFound = False Then
    ' Check if another user has it open.
    If IsFileLocked(StrWkBkNm) = True Then
      ' Report and exit if true
      MsgBox "The Excel workbook is in use." & vbCr & "Please try again later.", vbExclamation, "File in use"
      If bStrt = True Then .Quit
      Exit Sub
    End If
    ' The file is available, so open it.
    Set xlWkBk = .Workbooks.Open(FileName:=StrWkBkNm)
    If xlWkBk Is Nothing Then
      MsgBox "Cannot open:" & vbCr & StrWkBkNm, vbExclamation
      If bStrt = True Then .Quit
      Exit Sub
    End If
  End If
  ' Process the workbook.
  With xlWkBk.Worksheets(StrWkSht)
    ' Find the last-used row in column A.
    ' Add 1 to get the next row for data-entry.
    iDataRow = .Cells(.Rows.Count, 1).End(-4162).Row ' -4162 = xlUp
    ' Output the captured data.
    For i = 1 To iDataRow
      ' Skip over empty fields to preserve the underlying cell contents.
      If Trim(.Range("A" & i)) <> vbNullString Then
        xlFList = xlFList & "|" & Trim(.Range("A" & i))
        xlRList = xlRList & "|" & Trim(.Range("B" & i))
      End If
    Next
  End With
  If bFound = False Then xlWkBk.Close False
  If bStrt = True Then .Quit
End With
' Release Excel object memory
Set xlWkBk = Nothing: Set xlApp = Nothing
'Process each document in the folder
While strFile <> ""
  Set wdDoc = Documents.Open(FileName:=strFolder & "\" & strFile, AddToRecentFiles:=False, Visible:=False)
  'Process each word from the F/R List
  For i = 1 To UBound(Split(xlFList, "|"))
    With wdDoc.Range
      With .Find
.ClearFormatting
        
        .Replacement.ClearFormatting

' .MatchWholeWord = True
        .MatchCase = True
        .Wrap = wdFindStop
        'Set font name
         .Font.Name = "Tahoma"
        .Text = Split(xlFList, "|")(i)
               .Replacement.Font.Name = "Times new roman"
         .Replacement.Text = Split(xlRList, "|")(i)
' Debugger runtime errowr in below line: '        
.Execute Replace:=wdReplaceAll
      End With
    End With
  Next
  'Close the document
  wdDoc.Close SaveChanges:=True
 MsgBox "document saved"
  'Get the next document
  strFile = Dir()
Wend
Application.ScreenUpdating = False
' MsgBox "font conversion done"
End Sub
 
Function GetFolder() As String
Dim oFolder As Object
GetFolder = ""
Set oFolder = CreateObject("Shell.Application").BrowseForFolder(0, "Choose a folder", 0)
If (Not oFolder Is Nothing) Then GetFolder = oFolder.Items.Item.Path
Set oFolder = Nothing
 
End Function
Function IsFileLocked(strFileName As String) As Boolean
  On Error Resume Next
  Open strFileName For Binary Access Read Write Lock Read Write As #1
  Close #1
  IsFileLocked = Err.Number
  Err.Clear
End Function