Hi gillie3431
There are three 'clues' to three 'liquid letters' suggested by the extra letters. The first clue is 5 letters long, starts with D and ends in IE (which you have); the second starts with AW but it looks like you have a couple of mistakes in your list below (the B should be an E, the second E should be an O); and the third starts with ME but again it looks like you have a two or three mistakes (the I should be an O, the S should be an A and the second O should be an I).
Hope this is enough, just shout if you need any more.