A family of Microsoft word processing software products for creating web, email, and print documents.
This fix has worked for me and resolved almost all of the lag issues.
Go to Settings > Word > Reset Word > select the option to Clear All Documents.
Okay... followed the advice you've given, thank you, but couldn't tell you if it works because every time I reopen Word afterwards it turns that setting back off!!!!
That is normal, after clearing the documents initially the typing lag should be fixed and you should only have to clear the documents if the lag starts happening again, not every time you use the app.