Yes. It will take a little work, but you can do it. Go into the Bulk removal tool. Click on select all your ancestors and descendants. Go down through all the selected names, and also click ancestors and descendants again. If needs be, search and do the same thing for any extra names added. Once you have done that, go through and invert all checked names to unchecked, and all unchecked to checked. Then select remove. It will take a little work, but doing this will pretty well do what you are asking. There isn't a single button that will do it though.