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The Answers for Wordscapes Level 30634 from the Up 10 pack and Master group are: muse, must, muster, mute, rest, ruse, rust, ruts, serum, smut, stem, strum, sure, term, true, and user.
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.