The word oscillograph 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™ Play In The Letters oscillograph
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Seven Letter Word Alert: (29 words)
aircool, alcohol, apologs, caliphs, carhops, carpool, chloral, choragi, chorals, collars, corolla, gallops, garlics, gasohol, gorilla, graphic, isopach, largish, logical, pallors, phallic, pillars, polaric, prologs, prosaic, rosalic, scallop, scholar, scorpio