A family of Microsoft word processing software products for creating web, email, and print documents.
In Word, repeated objects such as watermarks are always anchored to the page header. To remove such an object, activate the header/footer view after which you can select and delete it.
Alternatively, an object that mimics a watermark could be anchored to some paragraph on a document page and positioned behind text. That means you would have to remove these objects one by one. The Selection pane will help you select those objects that reside on the current page. To speed up the process, using a macro to delete shapes in the drawing layer may help.