First thing you need to do is to reference the Word object model, as that will make it simpler (Tools>References).
In this example I've copied the cell A1, but that could be your concatenated text.
Range("A1").Copy
Application.ActivateMicrosoftApp xlMicrosoftWord
ActiveDocument.Range.PasteSpecial DataType:=wdPasteText
You then activate Microsoft Word (or open it, if it is not already open) and use the Word object model to paste the contents (hence the need for the reference). I have used the paste text option of paste special as you required simple text.
This is probably not the final solution for you, but should set you off in the right direction.
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