The word thrombolysis 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: 23
Highest Scoring Words With Friends™ Play In The Letters thrombolysis
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Seven Letter Word Alert: (28 words)
bistros, blossom, boorish, bossily, bristly, bristol, history, horsily, lyrists, missort, moistly, moorish, oboists, ooliths, rhymist, shortly, smooths, smoothy, soloist, soothly, sootily, stylish, symbiot, symbols, thrombi, tomboys, trisomy, tylosis