The word satisfyingly 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: 23
Highest Scoring Words With Friends™ Plays In The Letters satisfyingly
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Seven Letter Word Alert: (37 words)
agility, aisling, anglify, anglist, failing, faintly, falsity, fasting, filings, finials, flaying, intagli, lasting, lifting, lignify, listing, nastily, niftily, sailing, saintly, salsify, salting, satisfy, sayings, sifting, signals, signify, silting, slating, slaying, stagily, staying, stygian, styling, tailfin, tailing, tilings