The word cryptanalysis 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: 25
Highest Scoring Words With Friends™ Play In The Letters cryptanalysis
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Seven Letter Word Alert: (70 words)
airplay, alicant, analyst, anaptic, arctans, artisan, astylar, caltrap, cantrap, cantrip, capital, capstan, captain, carinal, carpals, casspir, catnaps, catnips, clarity, claypan, clipart, cranial, crassly, crisply, crystal, inclasp, instars, lariats, lyrists, nastily, nitryls, parlays, partial, pascals, patinas, patrial, plantar, plastic, playact, pliancy, ptyalin, racists, rapists, rascals, sacrals, saintly, saltpan, satanic, satraps, satrapy, scalars, scantly, scarily, scripts, spacial, spartan, spastic, spatial, spinals, spirals, splints, sprains, sprints, strains, tarpans, tarsals, trypsin, trysail, tsarina, typical