If I understand the query correctly, you have an image or a scanned document and want to convert them as words (editable pdf)?
Or is it a scanned word (.doc) file and you want to convert into pdf?
You can convert a scanned page or image to a pdf using Adobe PDF Pack. However, the converted pdf document would not be editable as the result would come up as an pdf document with non editable text.
Hope this answers your query.