As coded, the macro looks for a workbook named 'WordList.xlsx' in your Documents folder. You could have it look in whatever folder your document is by changing:
StrWkBkNm = "C:\Users" & Environ("Username") & "\Documents\WordList.xlsx"
to:
StrWkBkNm = ActiveDocument.Path & "\WordList.xlsx"
Otherwise, you could supply the fill path & filename.
Yes.
No, that's just a text comment. Regardless of what you change that to, the code will still look in column A. If you want to search a different column, change the column reference in the .Range("A" & i) references.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]