The word pilothouses 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: 18
Highest Scoring Words With Friends™ Play In The Letters pilothouses
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Seven Letter Word Alert: (32 words)
holiest, hoplite, hostels, hostile, hustles, isohels, isotope, loosest, lotuses, loutish, lushest, oolites, ooliths, outlies, outsole, pistols, piteous, pitless, postils, pothole, sleuths, slipout, soloist, solutes, soothes, stipule, stoolie, tipless, topless, topsoil, tousles, upshots