how to scan a document as a word, instead of pdf?

A scan is always a raster image. When you scan to PDF, all you're doing is embedding a raster image, such as a .tif or .jpg inside a PDF container on the fly. Which only succeeds in making it much harder to edit. Not only that, it doesn't save a lick of space over just saving it as a raster image format in the first place.

A Word document is completely different. Not even close to a raster image. If your intent is to somehow turn scans of text into editable Word documents in one move, it won't happen. You'd have to scan the document to a JPEG or some other raster format first, then use OCR (Optical Character Recognition) software to turn it into text. Then you could drop that converted text into a Word document and save it.

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I agree with kurt Lang's opinion. Through scanning, the created files are unable to edit format, usually is PDF format. Therefore, if you need a document, some Converter with OCR function supports switching the scanned PDF file to an editable word document. There is an article about converting PDF to Word file with OCR application. Hopefully, it would help you out.