The word thematically is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 24
Highest Scoring Words With Friends™ Plays In The Letters thematically
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Seven Letter Word Alert: (30 words)
acylate, alchemy, alethic, alltime, attache, cattail, cattily, chattel, climate, cyathia, ecthyma, emacity, ethical, helical, hellcat, hyalite, lactate, lacteal, lattice, laytime, lithely, meatily, metical, micella, mycelia, mycetal, tacitly, tactile, thalami, yachtie