The word glockenspiel 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: 27
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (60 words)
celling, closing, cognise, college, collies, collins, copings, copsing, eclipse, eelskin, ellipse, elogies, eloigns, eloping, enclose, enlocks, epilogs, epsilon, genlock, geocell, inlocks, keeling, keeping, kelpies, kelping, legions, license, lingoes, locking, lockpin, nickels, nickles, pecking, peeking, peeling, peglike, pencils, penlike, peonies, pickles, pigeons, pingles, pingoes, pleions, polices, pollens, polling, scoping, seeking, seeping, selling, silence, sillock, slocken, sloping, socking, sonlike, speckle, spiegel, splenic