The word spitefulness 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: 21
Highest Scoring Words With Friends™ Play In The Letters spitefulness
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Seven Letter Word Alert: (70 words)
eluents, enlists, ensuite, epistle, felines, felsite, feltpen, fetuses, finesse, finless, fistule, fitness, flenses, fluents, infests, infuses, insteps, insults, lefties, lenites, lessens, lineups, listens, luniest, lupines, nestles, netless, pelites, penises, penlite, penults, pestles, petless, pieless, pinless, pitless, plusses, puniest, punless, pussies, seitens, selfies, sessile, sestine, silents, sinless, sinuses, spinels, spinets, spinule, spleens, splines, splints, stifles, stipule, sulfite, sunless, sunsets, tensile, tieless, tinfuls, tinsels, tipless, tissues, tussles, unlists, unsplit, uplifts, useless, utensil