As you please Light.
One more thing I would like to add. Words of God in Arabic could also be understood as laws of nature that has made. It could take on this meaning on some verses , I still need to look into it.
Anyway, when it says that none can change the words of God it means that no human could ever change it. Which is true.Law was revealed to Moses, then Jesus come with new things and then muhammad comes with new things but all around the same concept. God can do whatever he likes, can you argue with God on how he want things done? Of course not? Can Humans change the words of God? Of oucrse not, because even if they do change whatever ink on paper they have, the words of God has not changed but whatever they added or erased changed, only God does. When it says that "NONE" can change it it is obvious God isn't including himself in this.
Now your next question would be " then why you call the Bible corrupt" well I can go on to explain it to you if you want to. Let me know
Laters