You can create an Excel workbook within Word. First, add a Reference to Excel in Word VBA (Tools -> References -> Microsoft Excel 16.0 Object Library). Then you can run the following.
Code:
Sub createExcelWkbk()
Dim obj As Excel.Application
Set obj = New Excel.Application
obj.Visible = True
Dim wkbk As Excel.Workbook
Set wkbk = obj.Workbooks.Add
End Sub
From here, you can use a range object in Word to add data to the Workbook.