The word oscillographs 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 oscillographs
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Seven Letter Word Alert: (44 words)
aircool, alcohol, apologs, caliphs, carhops, carpool, casspir, chloral, choragi, chorals, collars, colossi, corolla, gallops, garlics, gasohol, goosish, gorilla, graphic, isopach, largish, logical, pallors, phallic, pillars, polaric, porosis, prologs, prosaic, raspish, rosalic, sailors, scallop, scholar, schools, schorls, scillas, scorias, scorpio, scrolls, shrills, socials, sorghos, spirals