The Answers for Wordscapes Level 13786 from the Fall 13 pack and Master group are: crest, erect, reset, rest, scree, secret, secrete, sect, see, seer, set, steer, tee, terse, and tree.
Just a heads-up: the puzzle layout on Master levels is autogenerated, so the grid you see here might look a little different than the one in your game.