The Answers for Wordscapes Level 15451 from the Slope 2 pack and Master group are: deer, defer, deft, deter, fed, fee, feed, feet, fete, fetter, free, freed, fret, fretted, red, reed, reef, ref, tee, 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.